External Retaining Rings (Imperial, Series 2100-5100)
Imperial external retaining rings for shafts, series 2100-5100 — stamped rings assembled axially into a groove on the outside of a shaft. Ring numbers 25 through 800 cover shaft sizes 0.25 to 8 in the collected table, with per-size tolerances, thrust loads Fn/Fr/Frg and Nabl, and plier-tool assignments per size band. Full per-size table below.
Last updated: 2026-11
Specifications
This is the imperial counterpart of the metric external ring (the DIN 471 page covers that series): a thin stamped ring with lugs and holes at the gap, assembled axially with retaining-ring pliers into a groove machined on the outside of a shaft, where it shoulders an axial thrust load against the groove wall. The collected table sizes the rings by ring number — 25 through 800 — with the matching shaft diameter d1 printed per row (ring 25 → 0.25, ring 500 → 5), so the ring number, not the shaft size, is the ordering vocabulary. Unlike the metric DIN 471 sheet, this table prints every tolerance pair per size — the plus tolerances inline with each dimension and the minus tolerances as a positional sequence following the row — and it publishes the load set Fn/Fr/Frg and Nabl with the plier tool (A0/A01 through A5/A51) assigned per size band, which is genuinely part of the assembly specification: the wrong plier spreads the ring past its elastic limit. One caveat is preserved rather than resolved: the collected page heads the table "All measurements in millimeters (mm)" while the series is the imperial programme, so the values are reproduced exactly as printed with no unit conversion.
| Series | External retaining rings for shafts, imperial series 2100-5100; sizes by ring number 25-800 with shaft diameter d1 0.25-8 printed per row |
|---|---|
| Ring section s | 0.025 (ring 25) to 0.187 (ring 800), per-size tolerance pairs in the table below |
| Groove diameter d3 | Per-size groove-on-shaft diameter with printed tolerance pair (e.g. ring 50 → d3 .461 + .002 / -.005; ring 500 → 4.692 + .020 / -.030) — the groove must land inside the band for the ring to seat |
| Thrust loads Fn / Fr | Fn 175 (ring 25) to 96,100 (ring 800); Fr 599 to 178,843 — units as printed by the source |
| Nabl | 80,000 (ring 25) falling to 2,500 (ring 800) — as printed; the source’s supplementary load column |
| Tool assignment | Plier tools A0/A01 (small rings) through A5/A51 (ring 650+) printed per size band — part of the assembly specification, not an accessory afterthought |
| Units as printed | The collected page prints "All measurements in millimeters (mm)" over this imperial series; values are reproduced token-for-token with no conversion — confirm unit basis on the RFQ |
| MOQ / lead time | Not owner-confirmed for this family — confirmed at quotation |
| Ring n° | d1 (in) | s (in) | d3 (in) | a (in) | b (in) | c (in) | d5 (in) | d2 (in) | m (in) | n (in) | Fn | Fr | g (in) | Frg | Nabl | lbs* (per 1000) | Tool |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 0.25 | 0.025 + .002 / -.002 | .225 + .002 / -.004 | 0.08 + .003 / -.003 | 0.035 + .003 / -.003 | 0.025 + .003 / -.003 | 0.041 + .010 / -.002 | 0.023 + .0015 / -.0015 | 0.029 + .003 / -.000 | 0.03 | 175 | 599 | 0.011 | 470 | 80000 | 0.211 | A0 / A01 |
| 27 | 0.276 | 0.025 + .002 / -.002 | .250 + .002 / -.005 | 0.081 + .003 / -.003 | 0.035 + .003 / -.003 | 0.024 + .003 / -.003 | 0.041 + .010 / -.002 | 0.255 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.031 | 195 | 660 | 0.001 | 470 | 76000 | 0.22 | A0 / A01 |
| 28 | 0.281 | 0.025 + .002 / -.002 | .256 + .002 / -.005 | 0.08 + .003 / -.003 | 0.038 + .003 / -.003 | 0.025 + .003 / -.003 | 0.041 + .010 / -.002 | 0.261 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.03 | 200 | 670 | 0.012 | 470 | 74000 | 0.264 | A0 / A01 |
| 31 | 0.312 | 0.025 + .002 / -.002 | .281 + .002 / -.005 | 0.087 + .003 / -.003 | 0.04 + .003 / -.003 | 0.026 + .003 / -.003 | 0.041 + .010 / -.002 | 0.29 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.033 | 240 | 751 | 0.012 | 470 | 70000 | 0.284 | A0 / A01 |
| 34 | 0.344 | 0.025 + .002 / -.002 | .309 + .002 / -.005 | 0.087 + .003 / -.003 | 0.042 + .003 / -.003 | 0.027 + .003 / -.003 | 0.041 + .010 / -.002 | 0.321 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.033 | 265 | 812 | 0.013 | 470 | 64000 | 0.308 | A0 / A01 |
| 35 | 0.354 | 0.025 + .002 / -.002 | .320 + .002 / -.005 | 0.087 + .003 / -.003 | 0.046 + .003 / -.003 | 0.029 + .003 / -.003 | 0.041 + .010 / -.002 | 0.33 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.036 | 300 | 832 | 0.014 | 470 | 62000 | 0.352 | A0 / A01 |
| 37 | 0.375 | 0.025 + .002 / -.002 | .338 + .002 / -.005 | 0.088 + .003 / -.003 | 0.05 + .003 / -.003 | 0.031 + .003 / -.003 | 0.041 + .010 / -.002 | 0.352 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.036 | 320 | 883 | 0.016 | 470 | 60000 | 0.372 | A0 / A01 |
| 39 | 0.394 | 0.025 + .002 / -.002 | .354 + .002 / -.005 | 0.087 + .003 / -.003 | 0.052 + .003 / -.003 | 0.031 + .003 / -.003 | 0.041 + .010 / -.002 | 0.369 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.037 | 335 | 954 | 0.016 | 470 | 56500 | 0.396 | A0 / A01 |
| 40 | 0.406 | 0.025 + .002 / -.002 | .366 + .002 / -.005 | 0.087 + .003 / -.003 | 0.054 + .003 / -.003 | 0.033 + .003 / -.003 | 0.041 + .010 / -.002 | 0.382 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.036 | 350 | 964 | 0.017 | 470 | 55000 | 0.418 | A0 / A01 |
| 43 | 0.438 | 0.025 + .002 / -.002 | .395 + .002 / -.005 | 0.088 + .003 / -.003 | 0.055 + .003 / -.003 | 0.033 + .003 / -.003 | 0.041 + .010 / -.002 | 0.412 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.039 | 400 | 1035 | 0.018 | 470 | 50000 | 0.453 | A0 / A01 |
| 46 | 0.469 | 0.025 + .002 / -.002 | .428 + .002 / -.005 | 0.088 + .003 / -.003 | 0.06 + .003 / -.003 | 0.035 + .003 / -.003 | 0.041 + .010 / -.002 | 0.443 + .0020 / -.0020 | 0.029 + .003 / -.000 | 0.039 | 450 | 1117 | 0.018 | 470 | 42000 | 0.572 | A0 / A01 |
| 50 | 0.5 | 0.035 + .002 / -.002 | .461 + .002 / -.005 | 0.108 + .003 / -.003 | 0.065 + .004 / -.004 | 0.04 + .004 / -.004 | 0.047 + .010 / -.002 | 0.468 + .0020 / -.0020 | 0.039 + .003 / -.000 | 0.048 | 550 | 1675 | 0.02 | 910 | 40000 | 0.902 | A0 / A01 |
| 55 | 0.551 | 0.035 + .002 / -.002 | .509 + .005 / -.010 | 0.108 + .003 / -.003 | 0.053 + .004 / -.004 | 0.036 + .004 / -.004 | 0.047 + .010 / -.002 | 0.519 + .0020 / -.0020 | 0.039 + .003 / -.000 | 0.048 | 600 | 1800 | 0.017 | 910 | 36000 | 0.814 | A0 / A01 |
| 56 | 0.562 | 0.035 + .002 / -.002 | .521 + .005 / -.010 | 0.108 + .003 / -.003 | 0.072 + .004 / -.004 | 0.041 + .004 / -.004 | 0.047 + .010 / -.002 | 0.53 + .0020 / -.0020 | 0.039 + .003 / -.000 | 0.048 | 650 | 1878 | 0.023 | 910 | 35000 | 1.1 | A0 / A01 |
| 59 | 0.594 | 0.035 + .002 / -.002 | .550 + .005 / -.010 | 0.109 + .003 / -.003 | 0.076 + .004 / -.004 | 0.043 + .004 / -.004 | 0.047 + .010 / -.002 | 0.559 + .0030 / -.0030 | 0.039 + .003 / -.000 | 0.052 | 750 | 1979 | 0.024 | 910 | 32000 | 1.188 | A0 / A01 |
| 62 | 0.625 | 0.035 + .002 / -.002 | .579 + .005 / -.010 | 0.11 + .003 / -.003 | 0.08 + .004 / -.004 | 0.045 + .004 / -.004 | 0.047 + .010 / -.002 | 0.588 + .0030 / -.0030 | 0.039 + .003 / -.000 | 0.055 | 800 | 2091 | 0.025 | 910 | 30000 | 1.311 | A0 / A01 |
| 66 | 0.669 | 0.035 + .002 / -.002 | .621 + .005 / -.010 | 0.11 + .003 / -.003 | 0.082 + .004 / -.004 | 0.043 + .004 / -.004 | 0.047 + .010 / -.002 | 0.629 + .0030 / -.0030 | 0.039 + .003 / -.000 | 0.06 | 950 | 2233 | 0.024 | 910 | 29000 | 1.408 | A0 / A01 |
| 66 | 0.672 | 0.035 + .002 / -.002 | .621 + .005 / -.010 | 0.11 + .003 / -.003 | 0.082 + .004 / -.004 | 0.043 + .004 / -.004 | 0.047 + .010 / -.002 | 0.631 + .0030 / -.0030 | 0.039 + .003 / -.000 | 0.06 | 950 | 2233 | 0.024 | 910 | 29000 | 1.408 | A0 / A01 |
| 68 | 0.688 | 0.042 + .002 / -.002 | .635 + .005 / -.010 | 0.136 + .004 / -.004 | 0.084 + .005 / -.005 | 0.048 + .005 / -.005 | 0.052 + .010 / -.002 | 0.646 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.063 | 1000 | 3451 | 0.025 | 1340 | 28000 | 1.76 | A0 / A01 |
| 75 | 0.75 | 0.042 + .002 / -.002 | .693 + .005 / -.010 | 0.136 + .004 / -.004 | 0.092 + .005 / -.005 | 0.051 + .005 / -.005 | 0.052 + .010 / -.002 | 0.704 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.069 | 1200 | 3756 | 0.028 | 1340 | 26500 | 2.112 | A0 / A01 |
| 78 | 0.781 | 0.042 + .002 / -.002 | .722 + .005 / -.010 | 0.136 + .004 / -.004 | 0.094 + .005 / -.005 | 0.052 + .005 / -.005 | 0.052 + .010 / -.002 | 0.733 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.072 | 1300 | 3959 | 0.028 | 1340 | 25500 | 2.156 | A0 / A01 |
| 81 | 0.812 | 0.042 + .002 / -.002 | .751 + .005 / -.010 | 0.136 + .004 / -.004 | 0.096 + .005 / -.005 | 0.054 + .005 / -.005 | 0.052 + .010 / -.002 | 0.762 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.075 | 1450 | 4060 | 0.028 | 1340 | 24500 | 2.354 | A0 / A01 |
| 84 | 0.844 | 0.042 + .002 / -.002 | .780 + .005 / -.010 | 0.137 + .004 / -.004 | 0.1 + .005 / -.005 | 0.057 + .005 / -.005 | 0.052 + .010 / -.002 | 0.791 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.078 | 1500 | 4200 | 0.028 | 1340 | 24000 | 2.596 | A0 / A01 |
| 87 | 0.875 | 0.042 + .002 / -.002 | .810 + .005 / -.010 | 0.137 + .004 / -.004 | 0.104 + .005 / -.005 | 0.057 + .005 / -.005 | 0.052 + .010 / -.002 | 0.821 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.081 | 1650 | 4365 | 0.031 | 1340 | 23000 | 2.772 | A0 / A01 |
| 93 | 0.938 | 0.042 + .002 / -.002 | .867 + .005 / -.010 | 0.166 + .004 / -.004 | 0.11 + .005 / -.005 | 0.063 + .005 / -.005 | 0.078 + .015 / -.002 | 0.882 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.084 | 1850 | 4720 | 0.033 | 1340 | 21500 | 3.168 | A1 / A11 |
| 98 | 0.984 | 0.042 + .002 / -.002 | .910 + .005 / -.010 | 0.167 + .004 / -.004 | 0.114 + .005 / -.005 | 0.064 + .005 / -.005 | 0.078 + .015 / -.002 | 0.926 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.087 | 2000 | 4923 | 0.034 | 1340 | 20500 | 3.388 | A1 / A11 |
| 100 | 1 | 0.042 + .002 / -.002 | .925 + .005 / -.010 | 0.167 + .004 / -.004 | 0.116 + .005 / -.005 | 0.065 + .005 / -.005 | 0.078 + .015 / -.002 | 0.94 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.09 | 2100 | 5024 | 0.034 | 1340 | 20000 | 3.483 | A1 / A11 |
| 102 | 1.023 | 0.042 + .002 / -.002 | .946 + .005 / -.010 | 0.168 + .004 / -.004 | 0.118 + .005 / -.005 | 0.066 + .005 / -.005 | 0.078 + .015 / -.002 | 0.961 + .0030 / -.0030 | 0.046 + .003 / -.000 | 0.093 | 2250 | 5126 | 0.035 | 1340 | 19500 | 3.74 | A1 / A11 |
| 106 | 1.062 | 0.05 + .002 / -.002 | .982 + .010 / -.015 | 0.181 + .004 / -.004 | 0.122 + .006 / -.006 | 0.069 + .006 / -.006 | 0.078 + .015 / -.002 | 0.998 + .004 / -.004 | 0.056 + .004 / -.000 | 0.096 | 2400 | 6293 | 0.036 | 1950 | 19000 | 4.884 | A1 / A11 |
| 112 | 1.125 | 0.05 + .002 / -.002 | 1.041 + .010 / -.015 | 0.181 + .006 / -.006 | 0.181 + .006 / -.006 | 0.085 + .006 / -.006 | 0.087 + .000 / -.008 | 1.059 + .004 / -.004 | 0.056 + .004 / -.000 | 0.099 | 2600 | 6699 | 0.037 | 1950 | 18800 | 6.138 | A2 / A21 |
| 118 | 1.188 | 0.05 + .002 / -.002 | 1.098 + .010 / -.015 | 0.181 + .006 / -.006 | 0.181 + .006 / -.006 | 0.085 + .006 / -.006 | 0.087 + .000 / -.008 | 1.118 + .004 / -.004 | 0.056 + .004 / -.000 | 0.105 | 2950 | 7105 | 0.039 | 1950 | 18000 | 7.344 | A2 / A21 |
| 125 | 1.25 | 0.05 + .002 / -.002 | 1.156 + .010 / -.015 | 0.181 + .006 / -.006 | 0.181 + .006 / -.006 | 0.087 + .006 / -.006 | 0.108 + .000 / -.010 | 1.176 + .004 / -.004 | 0.056 + .004 / -.000 | 0.111 | 3250 | 7460 | 0.041 | 1950 | 17000 | 7.834 | A2 / A21 |
| 131 | 1.312 | 0.05 + .002 / -.002 | 1.214 + .010 / -.015 | 0.181 + .006 / -.006 | 0.181 + .006 / -.006 | 0.094 + .006 / -.006 | 0.108 + .000 / -.010 | 1.232 + .004 / -.004 | 0.056 + .004 / -.000 | 0.12 | 3700 | 7866 | 0.041 | 1950 | 16500 | 7.546 | A2 / A21 |
| 137 | 1.375 | 0.05 + .002 / -.002 | 1.272 + .010 / -.015 | 0.181 + .006 / -.006 | 0.181 + .006 / -.006 | 0.1 + .006 / -.006 | 0.108 + .000 / -.010 | 1.291 + .004 / -.004 | 0.056 + .004 / -.000 | 0.126 | 4100 | 8222 | 0.043 | 1950 | 16000 | 8.257 | A2 / A21 |
| 143 | 1.438 | 0.05 + .002 / -.002 | 1.333 + .010 / -.015 | 0.201 + .006 / -.006 | 0.201 + .006 / -.006 | 0.096 + .008 / -.008 | 0.108 + .000 / -.010 | 1.35 + .004 / -.004 | 0.056 + .004 / -.000 | 0.132 | 4500 | 8628 | 0.045 | 1950 | 15000 | 8.282 | A2 / A21 |
| 150 | 1.5 | 0.05 + .002 / -.002 | 1.387 + .010 / -.015 | 0.201 + .006 / -.006 | 0.201 + .006 / -.006 | 0.096 + .008 / -.008 | 0.108 + .000 / -.010 | 1.406 + .004 / -.004 | 0.056 + .004 / -.000 | 0.141 | 5000 | 8932 | 0.047 | 1950 | 14800 | 8.536 | A2 / A21 |
| 156 | 1.562 | 0.062 + .003 / -.003 | 1.446 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.098 + .008 / -.008 | 0.108 + .000 / -.010 | 1.468 + .005 / -.005 | 0.068 + .004 / -.000 | 0.141 | 5200 | 11571 | 0.049 | 3000 | 14000 | 13.706 | A3 / A31 |
| 162 | 1.625 | 0.062 + .003 / -.003 | 1.503 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.098 + .008 / -.008 | 0.108 + .000 / -.010 | 1.529 + .005 / -.005 | 0.068 + .004 / -.000 | 0.144 | 5500 | 12028 | 0.052 | 3000 | 13200 | 15.62 | A3 / A31 |
| 168 | 1.688 | 0.062 + .003 / -.003 | 1.560 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.1 + .008 / -.008 | 0.108 + .000 / -.010 | 1.589 + .005 / -.005 | 0.068 + .004 / -.000 | 0.148 | 5850 | 12535 | 0.054 | 3000 | 13000 | 14.89 | A3 / A31 |
| 175 | 1.75 | 0.062 + .003 / -.003 | 1.618 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.1 + .008 / -.008 | 0.108 + .000 / -.010 | 1.65 + .005 / -.005 | 0.068 + .004 / -.000 | 0.15 | 6200 | 12992 | 0.054 | 3000 | 12200 | 17.512 | A3 / A31 |
| 177 | 1.772 | 0.062 + .003 / -.003 | 1.637 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.1 + .008 / -.008 | 0.108 + .000 / -.010 | 1.669 + .005 / -.005 | 0.068 + .004 / -.000 | 0.154 | 6400 | 13144 | 0.055 | 3000 | 11700 | 17.512 | A3 / A31 |
| 181 | 1.812 | 0.062 + .003 / -.003 | 1.675 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.102 + .008 / -.008 | 0.108 + .000 / -.010 | 1.708 + .005 / -.005 | 0.068 + .004 / -.000 | 0.156 | 6650 | 13449 | 0.055 | 3000 | 11500 | 16.544 | A3 / A31 |
| 187 | 1.875 | 0.062 + .003 / -.003 | 1.735 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.102 + .008 / -.008 | 0.108 + .000 / -.010 | 1.769 + .005 / -.005 | 0.068 + .004 / -.000 | 0.159 | 7000 | 13906 | 0.056 | 3000 | 11000 | 18.238 | A3 / A31 |
| 196 | 1.969 | 0.062 + .003 / -.003 | 1.819 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.11 + .008 / -.008 | 0.108 + .000 / -.010 | 1.857 + .005 / -.005 | 0.068 + .004 / -.000 | 0.168 | 7800 | 14565 | 0.056 | 3000 | 10500 | 19.316 | A3 / A31 |
| 200 | 2 | 0.062 + .003 / -.003 | 1.850 + .013 / -.020 | 0.213 + .006 / -.006 | 0.213 + .006 / -.006 | 0.11 + .008 / -.008 | 0.108 + .000 / -.010 | 1.886 + .005 / -.005 | 0.068 + .004 / -.000 | 0.171 | 8050 | 14819 | 0.057 | 3000 | 10000 | 17.996 | A3 / A31 |
| 206 | 2.062 | 0.078 + .003 / -.003 | 1.906 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.11 + .010 / -.010 | 0.108 + .000 / -.010 | 1.946 + .006 / -.006 | 0.086 + .005 / -.000 | 0.174 | 8450 | 19234 | 0.059 | 5000 | 9600 | 22.11 | A3 / A31 |
| 212 | 2.125 | 0.078 + .003 / -.003 | 1.964 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.112 + .010 / -.010 | 0.108 + .000 / -.010 | 2.003 + .006 / -.006 | 0.086 + .005 / -.000 | 0.183 | 9150 | 19793 | 0.059 | 5000 | 9500 | 23.98 | A3 / A31 |
| 215 | 2.156 | 0.078 + .003 / -.003 | 1.993 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.112 + .010 / -.010 | 0.108 + .000 / -.010 | 2.032 + .006 / -.006 | 0.086 + .005 / -.000 | 0.186 | 9450 | 20097 | 0.058 | 5000 | 9400 | 24.024 | A3 / A31 |
| 225 | 2.25 | 0.078 + .003 / -.003 | 2.081 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.112 + .010 / -.010 | 0.108 + .000 / -.010 | 2.12 + .006 / -.006 | 0.086 + .005 / -.000 | 0.195 | 10350 | 21011 | 0.06 | 5000 | 9200 | 24.882 | A3 / A31 |
| 231 | 2.312 | 0.078 + .003 / -.003 | 2.139 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.114 + .010 / -.010 | 0.108 + .000 / -.010 | 2.178 + .006 / -.006 | 0.086 + .005 / -.000 | 0.201 | 10950 | 21518 | 0.06 | 5000 | 9000 | 25.476 | A3 / A31 |
| 237 | 2.375 | 0.078 + .003 / -.003 | 2.197 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.114 + .010 / -.010 | 0.108 + .000 / -.010 | 2.239 + .006 / -.006 | 0.086 + .005 / -.000 | 0.204 | 11400 | 22127 | 0.06 | 5000 | 8800 | 26.576 | A3 / A31 |
| 243 | 2.438 | 0.078 + .003 / -.003 | 2.255 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.118 + .010 / -.010 | 0.108 + .000 / -.010 | 2.299 + .006 / -.006 | 0.086 + .005 / -.000 | 0.207 | 11900 | 22736 | 0.061 | 5000 | 8600 | 28.028 | A3 / A31 |
| 250 | 2.5 | 0.078 + .003 / -.003 | 2.313 + .015 / -.025 | 0.209 + .006 / -.006 | 0.209 + .006 / -.006 | 0.118 + .010 / -.010 | 0.108 + .000 / -.010 | 2.36 + .006 / -.006 | 0.086 + .005 / -.000 | 0.21 | 12350 | 23345 | 0.062 | 5000 | 8400 | 28.446 | A3 / A31 |
| 255 | 2.559 | 0.078 + .003 / -.003 | 2.377 + .020 / -.030 | 0.248 + .008 / -.008 | 0.248 + .008 / -.008 | 0.132 + .012 / -.012 | 0.128 + .000 / -.010 | 2.419 + .006 / -.006 | 0.086 + .005 / -.000 | 0.21 | 12650 | 23853 | 0.065 | 5000 | 8200 | 33.66 | A3 / A31 |
| 262 | 2.625 | 0.078 + .003 / -.003 | 2.428 + .020 / -.030 | 0.248 + .008 / -.008 | 0.248 + .008 / -.008 | 0.134 + .012 / -.012 | 0.128 + .000 / -.010 | 2.481 + .006 / -.006 | 0.086 + .005 / -.000 | 0.216 | 13350 | 24462 | 0.066 | 5000 | 8000 | 35.882 | A3 / A31 |
| 268 | 2.688 | 0.078 + .003 / -.003 | 2.485 + .020 / -.030 | 0.248 + .008 / -.008 | 0.248 + .008 / -.008 | 0.134 + .012 / -.012 | 0.128 + .000 / -.010 | 2.541 + .006 / -.006 | 0.086 + .005 / -.000 | 0.219 | 13850 | 25071 | 0.067 | 5000 | 7900 | 35.64 | A3 / A31 |
| 275 | 2.75 | 0.093 + .003 / -.003 | 2.543 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.136 + .012 / -.012 | 0.128 + .000 / -.010 | 2.602 + .006 / -.006 | 0.103 + .005 / -.000 | 0.222 | 14400 | 30551 | 0.067 | 7350 | 7600 | 44.792 | A3 / A31 |
| 287 | 2.875 | 0.093 + .003 / -.003 | 2.659 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.136 + .012 / -.012 | 0.128 + .000 / -.010 | 2.721 + .006 / -.006 | 0.103 + .005 / -.000 | 0.231 | 15650 | 31973 | 0.069 | 7350 | 7300 | 45.21 | A3 / A31 |
| 293 | 2.938 | 0.093 + .003 / -.003 | 2.717 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.138 + .012 / -.012 | 0.128 + .000 / -.010 | 2.779 + .006 / -.006 | 0.103 + .005 / -.000 | 0.237 | 16400 | 32683 | 0.07 | 7350 | 7200 | 53.46 | A3 / A31 |
| 300 | 3 | 0.093 + .003 / -.003 | 2.775 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.14 + .012 / -.012 | 0.128 + .000 / -.010 | 2.838 + .006 / -.006 | 0.103 + .005 / -.000 | 0.243 | 17200 | 33394 | 0.07 | 7350 | 6700 | 48.4 | A3 / A31 |
| 306 | 3.062 | 0.093 + .003 / -.003 | 2.832 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.14 + .012 / -.012 | 0.128 + .000 / -.010 | 2.898 + .006 / -.006 | 0.103 + .005 / -.000 | 0.246 | 17750 | 34003 | 0.064 | 7350 | 6600 | 50.314 | A3 / A31 |
| 312 | 3.125 | 0.093 + .003 / -.003 | 2.892 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.14 + .012 / -.012 | 0.128 + .000 / -.010 | 2.957 + .006 / -.006 | 0.103 + .005 / -.000 | 0.252 | 18550 | 34815 | 0.072 | 7350 | 6600 | 51.37 | A3 / A31 |
| 315 | 3.156 | 0.093 + .003 / -.003 | 2.920 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.142 + .012 / -.012 | 0.128 + .000 / -.010 | 2.986 + .006 / -.006 | 0.103 + .005 / -.000 | 0.255 | 18950 | 35119 | 0.072 | 7350 | 6500 | 51.502 | A3 / A31 |
| 325 | 3.25 | 0.093 + .003 / -.003 | 3.006 + .020 / -.030 | 0.26 + .008 / -.008 | 0.26 + .008 / -.008 | 0.144 + .012 / -.012 | 0.128 + .000 / -.010 | 3.076 + .006 / -.006 | 0.103 + .005 / -.000 | 0.261 | 20000 | 36134 | 0.074 | 7350 | 6400 | 53.79 | A3 / A31 |
| 334 | 3.346 | 0.093 + .003 / -.003 | 3.092 + .020 / -.030 | 0.295 + .008 / -.008 | 0.295 + .008 / -.008 | 0.161 + .012 / -.012 | 0.15 + .000 / -.012 | 3.166 + .006 / -.006 | 0.103 + .005 / -.000 | 0.27 | 21000 | 37251 | 0.076 | 7350 | 6000 | 65.502 | A4 / A41 |
| 343 | 3.438 | 0.093 + .003 / -.003 | 3.179 + .020 / -.030 | 0.295 + .008 / -.008 | 0.295 + .008 / -.008 | 0.163 + .012 / -.012 | 0.15 + .000 / -.012 | 3.257 + .006 / -.006 | 0.103 + .005 / -.000 | 0.27 | 21900 | 38266 | 0.077 | 7350 | 5900 | 63.558 | A4 / A41 |
| 350 | 3.5 | 0.109 + .003 / -.003 | 3.237 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.165 + .012 / -.012 | 0.15 + .000 / -.012 | 3.316 + .006 / -.006 | 0.12 + .005 / -.000 | 0.276 | 22800 | 45574 | 0.073 | 10500 | 5900 | 89.276 | A4 / A41 |
| 354 | 3.543 | 0.109 + .003 / -.003 | 3.277 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.165 + .012 / -.012 | 0.15 + .000 / -.012 | 3.357 + .006 / -.006 | 0.12 + .005 / -.000 | 0.279 | 23300 | 46183 | 0.074 | 10500 | 5800 | 74.536 | A4 / A41 |
| 362 | 3.625 | 0.109 + .003 / -.003 | 3.352 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.165 + .012 / -.012 | 0.15 + .000 / -.012 | 3.435 + .006 / -.006 | 0.12 + .005 / -.000 | 0.285 | 24300 | 47299 | 0.076 | 10500 | 5700 | 79.838 | A4 / A41 |
| 368 | 3.688 | 0.109 + .003 / -.003 | 3.410 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.169 + .012 / -.012 | 0.15 + .000 / -.012 | 3.493 + .006 / -.006 | 0.12 + .005 / -.000 | 0.291 | 25300 | 48010 | 0.078 | 10500 | 5600 | 83.578 | A4 / A41 |
| 375 | 3.75 | 0.109 + .003 / -.003 | 3.468 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.171 + .012 / -.012 | 0.15 + .000 / -.012 | 3.552 + .006 / -.006 | 0.12 + .005 / -.000 | 0.297 | 26200 | 18822 | 0.08 | 10500 | 5500 | 95.568 | A4 / A41 |
| 387 | 3.875 | 0.109 + .003 / -.003 | 3.584 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.175 + .012 / -.012 | 0.15 + .000 / -.012 | 3.673 + .006 / -.006 | 0.12 + .005 / -.000 | 0.303 | 27700 | 50446 | 0.082 | 10500 | 5100 | 93.61 | A4 / A41 |
| 393 | 3.938 | 0.109 + .003 / -.003 | 3.642 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.175 + .012 / -.012 | 0.15 + .000 / -.012 | 3.734 + .006 / -.006 | 0.12 + .005 / -.000 | 0.306 | 28400 | 51359 | 0.082 | 10500 | 5200 | 102.41 | A4 / A41 |
| 400 | 4 | 0.109 + .003 / -.003 | 3.700 + .020 / -.030 | 0.315 + .012 / -.012 | 0.315 + .012 / -.012 | 0.177 + .012 / -.012 | 0.15 + .000 / -.012 | 3.792 + .006 / -.006 | 0.12 + .005 / -.000 | 0.312 | 29400 | 52171 | 0.081 | 10500 | 5000 | 95.964 | A4 / A41 |
| 412 | 4.125 | 0.109 + .003 / -.003 | 3.800 + .020 / -.030 | 0.331 + .012 / -.012 | 0.331 + .012 / -.012 | 0.183 + .016 / -.016 | 0.169 + .000 / -.012 | 3.915 + .006 / -.006 | 0.12 + .005 / -.000 | 0.315 | 29800 | 53200 | 0.081 | 10500 | 4900 | 102.564 | A4 / A41 |
| 425 | 4.25 | 0.109 + .003 / -.003 | 3.989 + .020 / -.030 | 0.331 + .012 / -.012 | 0.331 + .012 / -.012 | 0.187 + .016 / -.016 | 0.169 + .000 / -.012 | 4.065 + .006 / -.006 | 0.12 + .005 / -.000 | 0.276 | 27600 | 55419 | 0.088 | 10500 | 4800 | 102.564 | A4 / A41 |
| 437 | 4.375 | 0.109 + .003 / -.003 | 4.106 + .020 / -.030 | 0.331 + .012 / -.012 | 0.331 + .012 / -.012 | 0.189 + .016 / -.016 | 0.169 + .000 / -.012 | 4.19 + .006 / -.006 | 0.12 + .005 / -.000 | 0.276 | 28400 | 57043 | 0.088 | 10500 | 4700 | 112.2 | A4 / A41 |
| 450 | 4.5 | 0.109 + .003 / -.003 | 4.223 + .020 / -.030 | 0.331 + .012 / -.012 | 0.331 + .012 / -.012 | 0.191 + .016 / -.016 | 0.169 + .000 / -.012 | 4.31 + .006 / -.006 | 0.12 + .005 / -.000 | 0.285 | 30200 | 58667 | 0.061 | 10500 | 4500 | 110.924 | A4 / A41 |
| 475 | 4.75 | 0.109 + .003 / -.003 | 4.458 + .020 / -.030 | 0.331 + .012 / -.012 | 0.331 + .012 / -.012 | 0.193 + .016 / -.016 | 0.169 + .000 / -.012 | 4.55 + .006 / -.006 | 0.12 + .005 / -.000 | 0.3 | 33600 | 61915 | 0.069 | 10500 | 4200 | 115.412 | A4 / A41 |
| 500 | 5 | 0.109 + .003 / -.003 | 4.692 + .020 / -.030 | 0.331 + .012 / -.012 | 0.331 + .012 / -.012 | 0.195 + .016 / -.016 | 0.169 + .000 / -.012 | 4.79 + .006 / -.006 | 0.12 + .005 / -.000 | 0.315 | 37100 | 65163 | 0.099 | 10500 | 4000 | 119.416 | A4 / A41 |
| 525 | 5.25 | 0.125 + .004 / -.004 | 4.927 + .020 / -.040 | 0.378 + .012 / -.012 | 0.378 + .012 / -.012 | 0.201 + .016 / -.016 | 0.169 + .000 / -.012 | 5.03 + .007 / -.007 | 0.139 + .006 / -.000 | 0.33 | 40800 | 78460 | 0.101 | 13500 | 3900 | 191.4 | A4 / A41 |
| 550 | 5.5 | 0.125 + .004 / -.004 | 5.162 + .020 / -.040 | 0.378 + .012 / -.012 | 0.378 + .012 / -.012 | 0.203 + .016 / -.016 | 0.169 + .000 / -.012 | 5.265 + .007 / -.007 | 0.139 + .006 / -.000 | 0.351 | 45500 | 82215 | 0.105 | 13500 | 3700 | 201.718 | A4 / A41 |
| 575 | 5.75 | 0.125 + .004 / -.004 | 5.396 + .020 / -.040 | 0.378 + .012 / -.012 | 0.378 + .012 / -.012 | 0.211 + .016 / -.016 | 0.169 + .000 / -.012 | 5.5 + .007 / -.007 | 0.139 + .006 / -.000 | 0.366 | 49600 | 85971 | 0.11 | 13500 | 3500 | 217.404 | A4 / A41 |
| 600 | 6 | 0.125 + .004 / -.004 | 5.631 + .020 / -.040 | 0.378 + .012 / -.012 | 0.378 + .012 / -.012 | 0.217 + .016 / -.016 | 0.169 + .000 / -.012 | 5.745 + .007 / -.007 | 0.139 + .006 / -.000 | 0.381 | 53800 | 89625 | 0.086 | 13500 | 3400 | 228.272 | A4 / A41 |
| 625 | 6.25 | 0.156 + .005 / -.005 | 5.866 + .020 / -.050 | 0.425 + .012 / -.012 | 0.425 + .012 / -.012 | 0.224 + .016 / -.016 | 0.169 + .000 / -.012 | 5.985 + .008 / -.008 | 0.174 + .008 / -.000 | 0.396 | 58300 | 116522 | 0.089 | 21000 | 3100 | 301.4 | A4 / A41 |
| 650 | 6.5 | 0.156 + .005 / -.005 | 6.100 + .020 / -.050 | 0.531 + .012 / -.012 | 0.488 + .016 / -.016 | 0.291 + .016 / -.016 | 0.169 + .000 / -.012 | 6.225 + .008 / -.008 | 0.174 + .008 / -.000 | 0.411 | 62900 | 121191 | 0.114 | 21000 | 3000 | 349.624 | A5 / A51 |
| 675 | 6.75 | 0.156 + .005 / -.005 | 6.335 + .020 / -.050 | 0.531 + .012 / -.012 | 0.531 + .012 / -.012 | 0.291 + .016 / -.016 | 0.169 + .000 / -.012 | 6.465 + .008 / -.008 | 0.174 + .008 / -.000 | 0.426 | 67700 | 125860 | 0.12 | 21000 | 3000 | 384.604 | A5 / A51 |
| 700 | 7 | 0.156 + .005 / -.005 | 6.570 + .050 / -.130 | 0.531 + .012 / -.012 | 0.531 + .012 / -.012 | 0.291 + .016 / -.016 | 0.169 + .000 / -.012 | 6.705 + .008 / -.008 | 0.174 + .008 / -.000 | 0.441 | 72700 | 130529 | 0.125 | 21000 | 2900 | 392.04 | A5 / A51 |
| 725 | 7.25 | 0.187 + .005 / -.005 | 6.775 + .050 / -.130 | 0.551 + .012 / -.012 | 0.551 + .012 / -.012 | 0.291 + .016 / -.016 | 0.169 + .000 / -.012 | 6.942 + .008 / -.008 | 0.209 + .008 / -.000 | 0.46 | 78900 | 162096 | 0.128 | 30000 | 2800 | 517 | A5 / A51 |
| 750 | 7.5 | 0.187 + .005 / -.005 | 7.009 + .050 / -.130 | 0.551 + .012 / -.012 | 0.551 + .012 / -.012 | 0.291 + .016 / -.016 | 0.169 + .000 / -.012 | 7.18 + .008 / -.008 | 0.209 + .008 / -.000 | 0.48 | 84800 | 167678 | 0.132 | 30000 | 2700 | 550 | A5 / A51 |
| 775 | 7.75 | 0.187 + .005 / -.005 | 7.243 + .050 / -.130 | 0.551 + .012 / -.012 | 0.551 + .012 / -.012 | 0.295 + .016 / -.016 | 0.169 + .000 / -.012 | 7.42 + .008 / -.008 | 0.209 + .008 / -.000 | 0.495 | 90450 | 173261 | 0.136 | 30000 | 2600 | 571.45 | A5 / A51 |
| 800 | 8 | 0.187 + .005 / -.005 | 7.478 + .050 / -.130 | 0.551 + .012 / -.012 | 0.551 + .012 / -.012 | 0.295 + .016 / -.016 | 0.169 + .000 / -.012 | 7.66 + .008 / -.008 | 0.209 + .008 / -.000 | 0.51 | 96100 | 178843 | 0.141 | 30000 | 2500 | 594 | A5 / A51 |
- Row 1 (25): The collected page states "All measurements in millimeters (mm)" over an imperial series rendered here exactly as printed (no conversion). Loads Fn/Fr/Frg and Nabl are in the units printed by the source; lbs* is footnoted "per 1000 pieces".
- Row 17 (66): Ring n.66 prints twice in the source (d1 0.669 and 0.672); both rows kept as printed.
- Row 18 (66): Ring n.66 prints twice in the source (d1 0.669 and 0.672); both rows kept as printed.
- Row 77 (437): Ring 437 merges the Fn/Fr cells into one printed token pair "28400 57043" in the collected text; transcribed as printed.
Materials
- Material per RFQ — the collected specification table covers geometry and load figures only
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (External Retaining Rings (Imperial, Series 2100-5100)) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantities and lead times for this family are confirmed at quotation — send your sizes, grades and quantities on the RFQ and the quote will carry a firm schedule. Sample availability is confirmed with the quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
How do I order from a ring-number table instead of a shaft-size table?
Read the d1 column, not the ring number: each row pairs the ring number with the shaft diameter it fits (ring 25 → 0.25, ring 62 → 0.625, ring 500 → 5). Your drawing’s shaft diameter selects the row; the ring number is then the part vocabulary the supplier prices against. Machine the groove to the row’s d3 band and width m, and note the plier tool the table assigns to that band — the tool column exists because ring spread during assembly is sized to the ring’s section, and over-spreading a stamped ring permanently sets it.
Why does the table say millimeters on an imperial series?
That is how the collected source prints it — the page head states "All measurements in millimeters (mm)" over a table whose sizes are the imperial ring programme (0.25 through 8.00). This page reproduces the values token-for-token and applies no conversion, so the caveat is passed to you rather than silently resolved: state the unit basis and the ring number on the RFQ, and the supplier confirms the dimension basis of the part before quotation.
What should an RFQ for these retaining rings state?
State the standard (DIN 471 external for a shaft, or DIN 472 internal for a bore), the shaft or bore nominal diameter, the ring material (the collected sheets attribute A2 stainless steel to the rings), the groove diameter and width your drawing machines, and quantity per size. Commercial terms are confirmed at quotation.
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support