Iso 4762 Torque Standards

  
Iso 4762 Torque Standards Average ratng: 5,8/10 3711 reviews

12 rows  ISO 4762 Hexagon Socket Head Cap Screws Dimensional Standards and Technical. ISO 4762 / DIN 912 (fully threaded) d 5g 6g M12 (M14) M16 (M18) M20 D s k L quantity 100 1000+ 100 100 1000 100 100 1000. DIN 912 / ISO 4762 Socket Head Cap Screws. 8.8 Grade Bare Steel/Zinc Plated. Torque Information. Torque Information. Adjustment of Torque for Tightening Method and Friction Coefficient. Two major points have to be accounted for when installing a fastener. Inaccuracy of torque wrench tightening method can range anywhere from ±17 to ±23%.

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Torque Information

Adjustment of Torque for Tightening Method and Friction Coefficient

Two major points have to be accounted for when installing a fastener.

  • 1. Inaccuracy of torque wrench tightening method can range anywhere from ±17 to ±23%
  • 2. The friction coefficient changes when using lubrication on the thread.

1. Inaccuracy of tightening method

A torque wrench has a “scatter” (tolerance) of ±17% to ±23%. We must account for this in order not to over-tighten the fastener.

Example:
  • A M30-12.9 fastener has a maximum tightening torque of 2,280 Nm, based on a friction coefficient of 0.125 (zinc plated)
  • Maximum torque: 2,280Nm (= 123%) (or 117%)
  • Mean torque if scatter is +23% = 2,280 / 1.23 = 1,854 Nm
  • Minimum torque if scatter is +23% = 1,854 x 0.77 = 1,428 Nm

Torque should be set to 1,854 Nm (mean torque) on the torque wrench

The accuracy of the tightening method needs to be accounted for, in order to not over-tighten the fastener.

2. Friction coefficient

The surface condition of a fastener may change the torque that can be applied and needs to be accounted for.

Friction coefficients for standard finish fasteners

Surface ConditionLubrication Condition
ScrewNutOiledMoS2-Paste
– no treatment – phosphate– no treatment0.12-0.180.05-0.10
– electroplated appx. 8 μm– electroplated appx. 5 μm0.12-0.18
– dacromet-coated 6-8 μm– dacromet-coated 6-8 μm0.10-0.14
Example:A M30-12.9 fastener using MoS2 paste.
  • A M30-12.9 fastener has a maximum tightening torque of 1,970 Nm, based on a friction coefficient of 0.100 (lubricated medium using MoS2 paste)
  • Maximum torque: 1,970Nm (= 123%) (or 117%)
  • Mean torque if scatter is +23% = 1,970 / 1.23 = 1,602 Nm
  • Minimum torque if scatter is +23% = 1,602 x 0.77 = 1,234 Nm

Torque should be set to 1,602 Nm (mean torque) on the torque wrench

The accuracy of the tightening method, as well as the change in friction, needs to be accounted for in order not to over-tighten the fastener.

General Torque Figures

A torque value will be influenced by the fastening methods and tools used. The only way to determine an exact torque value is by actual application. The following figures are general guidelines only.

Figures in ft. lbs.

Thread DiameterProperty Class
8.810.912.9
M30.801.11.3
M41.82.63.1
M53.65.16.2
M671012
M8172529
M10334858
M126085102
M1497137165
M16150208250
M18201287342
M20282398479
M22390552664
M24499750843
M2774610511266
M3098213831657
M33133118752250
M36171724072895
M39222031203750
M42273738404638
M45339047625722
M48409557756825
M52525073879000
M566547922511280
M6081751147513800
M6499001395017175
M68120001695020100
M72142502010024000
M76168002362528350
M80197252760033375
M85240003322540125
M90283503892547700
M95334504687556250
M100390005475066000

Torque – Metric Fasteners

Iso 4762 12.9

DiameterRecommended Seating Torque (NM)Proof Torque min. (NM)
ISO 4762DIN 912DIN 7984ISO 10642DIN 7991ISO 7380ISO 7379ISO 4014/ 4017DIN 931 / DIN 933ISO 4162ISO4026 / 4027 4028 / 4029
Socket CapScrewsLow HeadSocket Cap

Screws

Flat HeadCountersunk

Socket Cap

Screws

Button HeadSocket Cap

Screws

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SocketShoulder

Screws

Hexagon HeadCap ScrewsHexagon FlangeScrewsSocket SetScrews
10.912.910.910.912.910.912.912.910.912.910.912.945H
M1.60.250.30
M20.500.63
M2.51.031.27
M31.832.201.151.151.351.151.350.90
M44.274.832.702.703.102.703.102.50
M58.6410.05.405.406.105.406.108.6410.08.6410.05.00
M614.716.89.159.1510.59.1510.55.614.716.814.716.88.50
M6.55.6
M835.641.022.022.026.022.026.09.635.641.035.641.020.0
M1070.681.044.044.052.044.052.02570.681.070.681.040.0
M1212314277.077.090.077.090.05112314212314265.0
M1351
M14195226122122143 australianpharmall.com19522619522665.0
M1630535019019022519022592305350305350160
M18420485262420485310
M20596685371370440245596685310
M22811930811930
M241031118010311180
M25485
M271508173015081730
M302048238020482380
M3327873262
M3635804190
M3946335420

Torque – Imperial Fasteners

DiameterRecommended Seating Torque (in-lb)Proof Torque min. (in-lb)
ASME B18.3ASME B18.2.1IFI-111ASME B18.3
Socket CapScrewsLow HeadSocket Cap

Screws

Flat HeadCountersunk

Socket Cap

Screws

Button HeadSocket Cap

Screws

Socket Shoulder ScrewsHexagon HeadCap Screws SAE J429

Grade 8

Hexagon FlangeScrews SAE J429

Grade 8

Socket SetScrews
#02.261.421.421.1
#14.012.522.522.1
#26.654.184.182.1
#310.16.336.336.0
#414.18.888.888.886.0
#520.813.113.113.111
#626.216.516.516.511
#848.030.130.130.123
#1069.543.743.743.740
1/41661041041043513413494
5/1634221521521590277277183
3/8608382382382200491491317
7/16973611611785785502
1/2148493193193136312021202750
9/1617321732
5/82792172217221722922238623861460
3/4495230541864422542252520
7/87991492868235750
11197973883443102268000
1-1/8169681046414485
1-1/42394414766563720442
1-3/8313941936026806
1-1/241611256921200235573

ISO 4762:2004

This standard was last reviewed and confirmed in 2018. Therefore this version remains current.

Abstract Preview

ISO 4762:2004 specifies the characteristics of hexagon socket head cap screws with coarse pitch thread from M1,6 up to and including M64 and product grade A.

Iso 4762 M8


General information

  • Publication date : 2004-03
  • Number of pages : 11
  • :
  • ICS :

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Iso 4762 Torque Standards Chart

Revisions / Corrigenda

  • Previously
    ISO 4762:1997
  • Now confirmed
    ISO 4762:2004
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