DIN 984 Internal Retaining Rings with Lugs
DIN 984 internal retaining rings with lugs, keyed on d3 18,3–79,5 mm — the lug-formed internal circlip whose ladder is tabulated by groove-related diameter with its own ring-geometry columns, distinct from the DIN 472 sheet.
Last updated: 2026-11
Specifications
DIN 984 is the lug-form internal retaining ring: assembled axially into a groove inside a bore with retaining-ring pliers gripping the lug holes, it holds a bearing or bushing from walking out of the housing. It belongs to the same part vocabulary as DIN 472 (internal rings for bores) — but it is a distinct sheet, not a duplicate: the collected DIN 984 table is keyed on the groove-related diameter d3 (18,3 → 79,5 mm) and carries a different column set (a max., b, d5 min., s) than the DIN 472 sheet in this catalog, and at the overlapping sizes the printed values differ (at d3 = 43,5 the 984 sheet prints a 7,2 / b 4,0 / s 1,75; the 472 sheet prints different figures at its adjacent rows). So treat the designation as the ordering contract: if your drawing says DIN 984, quote this ladder; if it says DIN 472, use the 472 page — and where the drawing does not fix the designation, send both the bore diameter and the groove drawing on the RFQ and let the supplier confirm which sheet governs. The collected table carries the ring-geometry columns only; the groove-width and load columns of the 472-style sheets are not tabulated here. Material and MOQ/lead terms are not established for this page — confirmed at quotation.
| Standard | DIN 984 — internal retaining rings with lugs (assembled axially into a bore groove; pliers engage the lug holes) |
|---|---|
| Ladder extent | Keyed on d3 18,3 – 79,5 mm, twenty-two rows in the collected table |
| Ring geometry | a (max.): 3,7 → 10,2; b: 2,2 → 6,6; d5 (min.): 1,7 → 3,0; s: 1,0 → 2,5 (all mm, as lettered by the source) |
| Distinction from DIN 472 | Different key (d3 vs nominal bore) and different column set; values differ at overlapping sizes — quote the designation your drawing carries |
| Material / commercial terms | Not established for this page — material and MOQ/lead time confirmed at quotation |
| d3 | a (max.) | b | d5 (min.) | s |
|---|---|---|---|---|
| 18,3 | 3,7 | 2,2 | 1,7 | 1,0 |
| 19,5 | 3,8 | 2,3 | 2,0 | 1,0 |
| 20,5 | 3,8 | 2,3 | 2,0 | 1,0 |
| 21,5 | 3,9 | 2,4 | 2,0 | 1,0 |
| 23,5 | 4,0 | 2,6 | 2,0 | 1,0 |
| 25,9 | 4,2 | 2,6 | 2,0 | 1,2 |
| 28,5 | 4,4 | 2,8 | 2,0 | 1,2 |
| 29,1 | 4,5 | 2,9 | 2,0 | 1,2 |
| 32,1 | 4,9 | 3,2 | 2,0 | 1,2 |
| 34,4 | 5,1 | 3,3 | 2,5 | 1,2 |
| 36,5 | 5,3 | 3,4 | 2,5 | 1,5 |
| 37,8 | 5,5 | 3,6 | 2,5 | 1,5 |
| 38,8 | 5,6 | 3,6 | 2,5 | 1,5 |
| 40,5 | 6,1 | 3,8 | 2,5 | 1,5 |
| 43,5 | 7,2 | 4,0 | 2,5 | 1,75 |
| 45,5 | 7,2 | 4,1 | 2,5 | 1,75 |
| 48,5 | 7,2 | 4,3 | 2,5 | 1,75 |
| 50,5 | 7,2 | 4,5 | 2,5 | 1,75 |
| 54,2 | 8,2 | 4,7 | 2,5 | 2,0 |
| 56,2 | 8,2 | 4,7 | 2,5 | 2,0 |
| 61,2 | 8,2 | 5,2 | 2,5 | 2,0 |
| 79,5 | 10,2 | 6,6 | 3,0 | 2,5 |
Materials
- Material not tabulated by the collected specification — state the housing environment (temperature, corrosion) with the RFQ
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 (DIN 984 Internal Retaining Rings with Lugs) 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
DIN 984 or DIN 472 — my drawing is ambiguous about the internal ring. What do I order?
Order by what your drawing actually says, because the two sheets are not interchangeable in their details. The DIN 472 page in this catalog is keyed on the nominal bore (8–300 mm) and carries the groove data a drawing needs (groove diameter, width, tolerances) plus load columns; this DIN 984 sheet is keyed on the groove-related diameter d3 (18,3–79,5 mm) and tabulates a smaller column set — and where the ladders overlap the printed values differ, so substituting one for the other is not a paper exercise. Practical RFQ: state the bore diameter, the groove diameter and width your housing machines, and the designation on the drawing; if the drawing names only "internal circlip", send the groove detail and let the supplier confirm which standard governs before quotation. The collected 984 table gives the ring geometry (a max., b, d5 min., s per d3 row, verbatim above); it does not carry groove-width or load columns, and material plus 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