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ISO 4762 Socket Head Cap Screws

Hexagon socket head cap screws per ISO 4762 — the current international designation DIN 912 was folded into — M1.6 to M64, steel classes 8.8/10.9/12.9 or A2/A4 stainless, thread 6g. Same screw, ISO paperwork.

Last updated: 2026-11

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ISO 4762 Socket Head Cap Screws in an industrial setting
Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

ISO 4762 is the designation international drawings increasingly carry: the hexagon socket head cap screw standard that absorbed DIN 912 — the collected table lists DIN 912 as the equivalent national designation and takes its dimensions "according to ISO 4762". The size line runs M1.6 through M64 in steel property classes 8.8, 10.9 and 12.9 or A2/A4 stainless, thread tolerance 6g (5g6g on class 12.9). At M12 the head measures 18.00 mm across with a 12.00 mm height, a 10 mm hex socket and a 6 mm minimum key engagement — the two-millimetre-per-size head growth below M24 that makes socket heads predictable to design around. If your documentation still says DIN 912, it is the same part: see that page for the DIN-designated route.

Standard ISO 4762 — hexagon socket head cap screw; DIN 912 is the equivalent national designation
Size range M1.6 – M64
Dimensions at M12 dk (head diameter) max 18.00 mm; k (head height) max 12.00 mm; s (hex socket) nominal 10 mm; t (key engagement) min 6 mm
Thread 6g; 5g6g for strength class 12.9
Strength classes Steel 8.8, 10.9, 12.9; stainless A2, A4
ISO 4762 hexagon socket head cap screws — head/body/socket dimensions M3–M24 (mm)Millimetres. Body diameter and head diameter as max/min pairs; hex socket nominal; socket depth (key engagement) as printed.
Nominal SizePitch P (mm)Hex Socket JBody Dia. MaxBody Dia. MinHead Dia. A MaxHead Dia. A MinSocket Depth K
M30.52.53.002.865.505.201.30
M40.73.04.003.827.006.642.00
M50.84.05.004.828.508.142.70
M61.05.06.005.8210.009.643.30
M81.256.08.007.7813.0012.574.30
M101.58.010.009.7816.0015.575.50
M121.7510.012.0011.7318.0017.576.60
M162.014.016.0015.7324.0023.488.80
M202.517.020.0019.6730.0029.4810.70
M243.019.024.0023.6736.0035.3812.90
ISO 4762 — full property grid, M1.6–M64 (mm)Millimetres. Rows are the standard’s property symbols (P pitch, b thread length on grip, dk head, da washer-face/transition, ds shank, e socket opposite-corner, h flank protrusion, k head height, r fillet, s socket across-flats, t key engagement, v undercut, dw bearing face, w top width); columns run M1.6 through M64 in the printed size ladder, parenthesis-free sizes standard. Values reproduced verbatim including decimal commas as printed.
PropertyLevelM1,6M2M2,5M3M4M5M6M8M10M12(M14)M16M20M24M30M36M42M48M56M64
P0,350,40,450,50,70,811,251,51,75222,533,544,555,56
b1516171820222428323640445260728496108124140
dkmax.3,003,804,505.507,008,5010.0013,0016,0018,0021,0024,0030,0036,0045,0054,0063,0072,0084,0096,00
max. for grooved head3,143,984,685.687,228,7210,2213,2716,2718,2721,3324,3330,3336,3945,3954,4663,4672,4684,5496,54
min.2,863,624,325,326,788,289,7812,7315,7317,7320,6723,6729,6735,6144,6153,5462,5471,5483,4695,46
damax.22,63,13,64,75,76,89,211,213,715,717,722,426,433,439,445,652,66371
dsmax.1,602,002,503,004,005,006,008,0010,0012,0014,0016.0020,0024,0030,0036,0042,0048,0056,0064,00
min.1,461,862,362,863,824,825,827,789,7811,7313,7315,7319,6723,6729,6735,6141,6147,6155,5463,54
emin.1,7331,7332,3032,8733,4434,5835,7236,8639,14911,42913,71615,99619,43721,73425,15430,85436,57141,13146,83152,531
hmax.0,340,510,510,510,60,60,681,021,021,451,451,452,042,042,892,893,063,915,955,95
kmax.1,602,002,503,004,005,006,08,0010,0012,0014,0016,0020,0024,0030,0036,0042,0048,0056,0064,00
min.1,461,862,362,863,824,825,77,649,6411,5713,5715,5719,4823,4829,4835,3841,3847,3855,2663,26
rmin.0,10,10,10,10,20,20,250,40,40,60,60,60,80,8111,21,622
snominal1,51,522,5345681012141719222732364146
max.1,581,582,082,583,084,0955,146,148,17510,17512,21214,21217,2319,27522,27527,27532,3336,3341,3346,33
min.1,521,522,022,523,024,0205.026,028,02510,02512,03214,03217,0519,06522,06527,06532,0836,0841,0846,08
tmin.0,711,11,322,5345678101215,51924283438
vmax.0,160,20,250,30,40,50,60.811,21,41,622,433,64,24,85,66,4
dwmin.2,723,484,185,076,538,039,3812,3315,3317,2320,1723,1728,8734,8143,6152,5461,3470,3482,2694,26
wmin.0,550,550,851,151,41,92,33,344,85,86,88,610,413,115,316,317,51922
ISO 4762 — thread lengths ls/lg, M1.6–M12 by nominal length (mm)Millimetres. Per nominal screw length l, the ls (unthreaded body/grip beyond? per standard: minimum thread projection) and lg (grip length) min/max pairs; "full thread" marks lengths where the thread runs the whole shank. Column pairs follow the printed ladder; empty cells are lengths not offered in that size.
l nominalmin.max.min.max.min.max.min.max.min.max.min.max.min.max.min.max.min.max.min.max.min.max.
2,52,32,7full thread
32,83,2full thread
43,764,24full thread
54,765,24full thread
65,766,24full thread
87,718,29full thread
109,7110,29full thread
1211,6512,35full thread
1615,6516,35full thread
2019,5820,4224full thread
2524,5825,425,7584,57full thread
3029,5830,429,5126,51048full thread
3534,535,511,515913611full thread
4039,540,516,520141811165,7512full thread
4544,545,51923162110,75175,513full thread
5049,550,52428212615,752210,518
5554,455,6263120,752715,52310,2519
6059,460,6313625,753220,52815,2524
6564,465,630,753725,53320,2529
7069,470,635,754230,53825,2534
8079,480,645,755240,54835,2544
9089,390,750,55845,2554
10099,3100,760,56855,2564
110109,3110,765,2574
120119,3120,775,2584
130129,2130,8
140139,2140,8
150149,2150,8
160159,2160,8
180179,2180,8
200199,07200,92
220219,07220,92
240239,07240,92
260258,95261,05
280278,95281,05
300298,95301,05
ISO 4762 — thread lengths ls/lg, (M14)–M64 by nominal length (mm)Same reading as the M1.6–M12 ladder: per nominal length l, ls/lg min/max pairs, "full thread" where the shank is fully threaded.
l nominallslglslglslglslglslglslglslglslglslglslg
1615,6516,35
2019,5820,42full thread
2524,5825,42full threadfull thread
3029,5830,42full threadfull threadfull thread
3534,535,5full threadfull threadfull threadfull thread
4039,540,5full threadfull threadfull threadfull thread
4544,545,5full threadfull threadfull threadfull threadfull thread
5049,550,5full threadfull threadfull threadfull threadfull thread
5554,455,6full threadfull threadfull threadfull threadfull threadfull thread
6059,460,61020full threadfull threadfull threadfull threadfull threadfull thread
6564,465,615251121full threadfull threadfull threadfull threadfull thread
7069,470,620301626full threadfull threadfull threadfull threadfull threadfull thread
8079,480,63040263615,528full threadfull threadfull threadfull threadfull threadfull thread
9089,390,74050364625,5381530full threadfull threadfull threadfull threadfull threadfull thread
10099,3100,75060465635,5482540full threadfull threadfull threadfull threadfull threadfull thread
110109,3110,76070566645,558355020,538full threadfull threadfull threadfull threadfull thread
120119,3120,77080667655,568456030,5481636full threadfull threadfull threadfull thread
130129,2130,88090768665,578557040,5582646full threadfull threadfull threadfull thread
140139,2140,890100869675,588658050,568365621,544full threadfull threadfull thread
150149,2150,89610685,598759060,578466631,554full threadfull threadfull thread
160159,2160,810611695,51088510070,588567641,5642752full threadfull thread
180179,2180,8115,512810512090,5108769661,584477228,556full thread
200199,075200,925135,5148125140110,51289611681,5104679248,5763060
220219,075220,925101,51248711268,5965080
240239,075240,925121,515510713288,511670100
260258,95261,05141,5164127152108,513690120
280278,95281,05161,5184147172128,5156110140
300298,95301,05181,5204167192148,5176130160
ISO 4762 socket head cap screws — headline dimensions M3–M36 (mm)Millimetres, single-value summary figures (maxima and nominals). The M14 row is starred in the source (non-preferred size).
SizePitch (mm)Head Dia. A max (mm)Body Dia. D max (mm)Head Height H max (mm)Hex Key J nominal (mm)Key Engagement T min (mm)
M30.55.5332.51.5
M40.774432
M50.88.55542.5
M61106653
M81.25138864
M101.516101085
M121.75181212106
M14*2211414127
M162241616148
M202.53020201710
M2433624241912
M303.54530302215
M3645436362718
ISO 4762 socket head cap screws — strength, shear and seating torque M3–M36Material minimum tensile in MPa (property class 12.9 ladder M3–M16, 10.9 figures M20+ as printed); screw tensile and body single shear in kN minimum; seating torque for plain finish in N-m. Values as printed by the source.
SizeMin Tensile of Material (MPa)Screw Tensile min (kN)Single Shear min (kN)Seating Torque plain (N-m)
M313006.545.52.1
M4130011.49.84.6
M5130018.515.39.5
M6130026.122.0516
M8130047.639.239
M10130075.46177
M12130011088135
M14*1300150120215
M161300204157330
M201250306235.5650
M2412504413391100
M3012507015302250
M36125010207563850
  • Row 10 (M20): From M20 the printed material minimum drops from 1300 to 1250 MPa — the source mixes class 12.9 (small sizes) and class 10.9 (large sizes) figures in one ladder; confirm the class with the size at RFQ.
ISO 4762 socket head cap screws — drill and counterbore preparation M3–M36 (mm)Millimetres. Close-fit and normal-fit pilot drill diameters and counterbore diameter for the screw head.
SizeHex Key (mm)Close-fit Drill (mm)Normal-fit Drill (mm)Counterbore Dia. (mm)
M32.53.43.76.5
M434.44.88.25
M545.45.89.75
M656.46.811.25
M868.48.814.25
M10810.510.817.25
M121012.512.819.25
M141214.514.7522.25
M161416.516.7525.5
M201720.520.7531.5
M241924.524.7537.5
M302230.7531.7547.5
M36273737.556.5
ISO 4762 socket head cap screws — grip and body lengths by nominal length (mm)Millimetres. Grip length LG (maximum unthreaded gap under the head) and body length LB (minimum) per nominal screw length, as printed.
SizeNominal Length (mm)Grip Length LG max (mm)Body Length LB min (mm)
M6401611
M6502621
M6603631
M6805651
M61007671
M8502215.7
M8603225.7
M8805245.7
M81007265.7
M10501810.5
M10602820.5
M10804840.5
M101006860.5
M12602415.2
M12804435.2
M121006455.2
M16702616
M16803626
M161005646
ISO 4762 — recommended hex key, hole preparation and counterbore, M3–M36 (mm)All dimensions in millimetres. Close-fit and normal-fit are the drilled hole preparations under the head; the counterbore column is the bore that clears the head. Values reproduced verbatim from the collected chart.
SizeHex keyClose-fit drillNormal-fit drillCounterbore diameter
M32.53.43.76.5
M434.44.88.25
M545.45.89.75
M656.46.811.25
M868.48.814.25
M10810.510.817.25
M121012.512.819.25
M141214.514.7522.25
M161416.516.7525.5
M201720.520.7531.5
M241924.524.7537.5
M302230.7531.7547.5
M36273737.556.5
  • Row 8 (M14): The size prints M14 here without the asterisk the same maker's dimension and strength tables carry on M14 — as printed; confirm the M14 footnote (if any) with the maker before relying on the row.
ISO 4762 — grip length and minimum body length by nominal length, M6–M16 (mm)All dimensions in millimetres. LG is the grip length (unthreaded shank + head, maximum) for the listed nominal length; LB is the minimum body length. The chart does not tabulate every nominal length the standard allows — the printed pairs only; other lengths are per RFQ, not extrapolated.
SizeNominal lengthGrip length LG, maxBody length LB, min
M6401611
M6502621
M6603631
M6805651
M61007671
M8502215.7
M8603225.7
M8805245.7
M81007265.7
M10501810.5
M10602820.5
M10804840.5
M101006860.5
M12602415.2
M12804435.2
M121006455.2
M16702616
M16803626
M161005646
  • Row 10 (M10): The M10 ladder prints body length (10.5 / 20.5 / 40.5 / 60.5) below the M8 ladder (15.7 / 25.7 / 45.7 / 65.7) despite the larger size — the source's grip/body split for M10 breaks the series pattern; reproduced verbatim, verify against ISO 4762 for critical design.
  • Row 17 (M16): The M16 ladder starts at 70 mm nominal where every other size starts at 50 or 60 — the source prints no shorter M16 rows; shorter grips are not tabulated here, per RFQ.

Materials

  • Steel
  • Alloy steel
  • Stainless steel

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 (ISO 4762 Socket Head Cap Screws) 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 quantity is 10,000 pieces. Stock items run 3–7 days. Quantities or variants outside the standard range are confirmed at 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

Is ISO 4762 the same as DIN 912?

Dimensionally, yes — the collected standard tables cross-reference each other, and the DIN 912 page's dimension columns are explicitly titled "Table according to ISO 4762" over the same M1.6–M64 range. What changed is the paperwork: ISO 4762 is the current international designation and DIN 912 the withdrawn national one. For procurement the distinction is only which designation your drawing, ERP or customer specification prints — order that one and note the equivalence if your supplier lists the other.

What is the MOQ and lead time for these socket screws?

Minimum order quantity is 10,000 pieces per item. Stocked sizes ship in 3–7 days; non-stock diameters, lengths or finishes are quoted with a confirmed schedule. Common sizes in this designation are widely stocked — confirm the exact schedule against quantity and size mix at quotation.

What should an RFQ for these socket screws state?

State the standard designation (for example DIN 912, ISO 4762 or DIN 913), thread size and pitch, head or length dimension, strength class or stainless grade (such as 12.9, A2-70 or A4-80), finish (black oxide, zinc plated, or plain), required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country.

Related knowledge

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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

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