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GM Test Products

General Motors Test Bolts, Nuts & Washers

Wilson-Garner manufactures test bolts and stocks test nuts and washers for several General Motors tests, including torque-tension, bearing surface, coefficient of friction, and torsional yield tests. Test products must be uniform to ensure accurate results across tests, and Wilson-Garner holds ourselves to exacting quality standards to ensure you get results you can trust.

We’re dedicated to going the extra mile. Based on customer feedback, we now re-roll threads on all of our test bolts after heat treat and surface finish to eliminate nicks or plating inconsistencies. Our parts are American-made and conform to the requirements of the following General Motors Engineering Standards:

GMW3044 | GMW3359 | GMW16722 | GM7112M | GMW4707 | GMW3179 Code G | GM6076M | GM6124M | GM6175M | GM6189P | GM6194 | GMW25

General Motors Torque-Tension Certification Testing Products In Stock

GM7112M/GMW4704

Thread SizeTest Bolt Part Number
M6 x 1.0011516103
M8 x 1.2511516104
M10 x 1.5011516105
M12 x 1.7511516106
M14 x 2.0011516107
M16 x 2.0011516108
Thread SizeTest Nut Part Number
M6 x 1.0011516088
M8 x 1.2511516089
M10 x 1.5011516090
M12 x 1.7511516091
M14 x 2.0011516092
M16 x 2.0011516093
Thread SizeTest Washer Part Number
M6 x 1.0011503952 (SFM006HZ)
M8 x 1.2511502643 (SFM008HZ)
M10 x 1.5011502644 (SFM010HZ)
M12 x 1.7511502645 (SFM012HZ)
M14 x 2.0011502646 (SFM014HZ)
M16 x 2.0011502647 (SFM016HZ)

GMW 3044/GMW 3359

Test Bolt Part NumberTest Nut Part NumberTest Washer Part Number
115161051151609011502644 (SFM010HZ)
M10 x 1.50 x 40mm Class 9.8 Plain FinishM10 x 1.50 Style 1 Zinc FinishZinc Finish Square Test Washer Hardened
Test Bolt Part Number
11516105
M10 x 1.50 x 40mm Class 9.8 Plain Finish
Test Nut Part Number
11516090
M10 x 1.50 Style 1 Zinc Finish
Test Washer Part Number
11502644 (SFM010HZ)
Zinc Finish Square Test Washer Hardened

Bearing Surface Characteristics Testing

GMW 3359

Test Bolt Part NumberTest Nut Part NumberTest Washer Part Number
1157010211516090SFM010ALUMSFM010SCEC
M10 x 1.50 x 60mm Class 10.9 – M14 Head Plain FinishM10 x 1.50 Style 1 Zinc FinishM10 Square AluminumM10 Square ELPO Finish
Test Bolt Part Number
11570102
M10 x 1.50 x 60mm Class 10.9 – M14 Head Plain Finish
Test Nut Part Number
11516090
M10 x 1.50 Style 1 Zinc Finish
Test Washer Part Number
SFM010ALUMSFM010SCEC
M10 Square AluminumM10 Square ELPO Finish

Coefficient of Friction Testing

GMW 3044/GMW 3359 – per ISO 16047

Test Bolt Part NumberTest Nut Part NumberTest Washer Type HL Part NumberTest Washer Type HH Part Number
HHM10150060-WZ10211611982 or 11611982-S43711611945NPN4
M10 x 1.50 x 60mm Class 10.9 16mm Head Plain FinishM10 x 1.50 Class 10 Plain Finish or Zinc S437 FinishM10 Square Washer Type HL Plain FinishM10 Square Washer Type HH Plain Finish
Test Bolt Part Number
HHM10150060-WZ102
M10 x 1.50 x 60mm Class 10.9 16mm Head Plain Finish
Test Nut Part Number
11611982 or 11611982-S437
M10 x 1.50 Class 10 Plain Finish or Zinc S437 Finish
Test Washer Type HL Part Number
11611945
M10 Square Washer Type HL Plain Finish
Test Washer Type HH Part Number
NPN4
M10 Square Washer Type HH Plain Finish

GMW 3179 – per ISO 16047

Test Nut Part Number
11611982
M10 x 1.50 Class 10 Plain Finish
Test Bolt Part Number
HHM10150060-WZ102
M10 x 1.50 x 60mm Class 10.9 16mm Head Plain Finish
Test Bolt Part Number
11570102
M10 x 1.50 x 60mm Class 10.9 – M14 Head Plain Finish
Test Bolt Part NumberTest Bolt Part NumberTest Nut Part NumberTest Washer Type HL Part Number
11570102HHM10150060-WZ1021161198211611945
M10 x 1.50 x 60mm Class 10.9 – M14 Head Plain FinishM10 x 1.50 x 60mm Class 10.9 16mm Head Plain FinishM10 x 1.50 Class 10 Plain FinishM10 Square Washer Type HL Plain Finish
Test Washer Type HL Part Number
11611945
M10 Square Washer Type HL Plain Finish

GM Test Bolt: 11516103

M6 X 1.00 X 25MM PC9.8 Hex Head GM Test Bolt Plain

This M6 Property Class 9.8 test bolt is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707
  • GMW16722

SKU: 11516103

GM Test Nut: 11516088

M6 X 1.00 Style 1 Hex GM Test Nut Zinc

This zinc plated M6 test nut is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707

SKU: 11516088

GM Test Washer: 11503952 (SFM006HZ)

M6 Square GM Test Washer Zinc
This M6 zinc plated hardened square test washer is suitable for torque-tension certification tests performed to the following specs:

  • GMW16722
  • GM7112M
  • GMW4707

SKU: SFM006HZ

GM Test Bolt: 11516104

M8 X 1.25 X 35MM PC9.8 Hex Head GM Test Bolt Plain

This M8 Property Class 9.8 test bolt is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707
  • GMW16722

SKU: 11516104

GM Test Nut: 11516089

M8 X 1.25 Style 1 Hex GM Test Nut Zinc

This zinc plated M8 test nut is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707

SKU: 11516089

GM Test Washer: 11502643 (SFM008HZ)

M8 Square GM Test Washer Zinc

This M8 zinc plated hardened square test washer is suitable for torque-tension certification tests performed to the following specs:

  • GMW16722
  • GM7112M
  • GMW4707

SKU: SFM008HZ
Alt. Part Number: 11502643

GM Test Washer: 11516105

M10 X 1.50 X 40MM PC9.8 Hex Head GM Test Bolt Plain

This plain Property Class 9.8 test bolt is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GMW3044
  • GMW3359
  • GM7112M
  • GMW4707
  • GMW16722

SKU: 11516105

GM Test Nut: 11516090

M10 X 1.50 Hex GM Style 1 Test Nut Zinc

This zinc plated Class 10 test nut is made to GM specifications and is suitable for torque-tension and bearing surface tests performed to the following specs:

  • GMW3044
  • GMW3359
  • GM7112M
  • GMW4707

SKU: 11516090

GM Test Washer: 11502644 (SFM010HZ)

Description: M10 Square GM Test Washer Zinc

This zinc plated hardened square test washer is suitable for torque-tension certification tests performed to the following specs:

  • GMW3044
  • GMW3359
  • GMW16722
  • GM7112M
  • GMW4707

SKU: SFM010HZ
Alt. Part Number: 11502644

GM Test Bolt: 11516106

M12 X 1.75 X 50MM PC9.8 Hex Head GM Test Bolt Plain

This M12 Property Class 9.8 test bolt is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707
  • GMW16722

SKU: 11516106

GM Test Nut: 11516091

M12 X 1.75 Style 1 Hex GM Test Nut Zinc

This zinc plated M12 test nut is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707

SKU: 11516091

GM Test Washer: 11502645 (SFM012HZ)

M12 Square GM Test Washer Zinc

This M12 zinc plated hardened square test washer is suitable for torque-tension certification tests performed to the following specs:

  • GMW16722
  • GM7112M
  • GMW4707

SKU: SFM012HZ
Alt. Part Number: 11502645

GM Test Bolt: 11516107

M14 X 2.00 X 60MM PC9.8 Hex Head GM Test Bolt Plain

This M14 Property Class 9.8 test bolt is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707
  • GMW16722

SKU: 11516107

GM Test Nut: 11516092

M14 X 2.00 Style 1 Hex GM Test Nut Zinc

This zinc plated M14 test nut is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707

SKU: 11516092

GM Test Washer: 11502646 (SFM014HZ)

M14 Square GM Test Washer Zinc

This M14 zinc plated hardened square test washer is suitable for torque-tension certification tests performed to the following specs:

  • GMW16722
  • GM7112M
  • GMW4707

SKU: SFM014HZ
Alt. Part Number: 11502646

GM Test Bolt: 11516108

M16 X 2.00 X 65MM PC9.8 Hex Head GM Test Bolt Plain

This M16 Property Class 9.8 test bolt is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707
  • GMW16722

SKU: 11516108

GM Test Nut: 11516093

M16 X 2.00 Style 1 Hex GM Test Nut Zinc

This zinc plated M16 test nut is made to General Motors specifications and is suitable for torque-tension tests performed to the following GM Specs:

  • GM7112M
  • GMW4707

SKU: 11516093

GM Test Washer: 11502647 (SFM016HZ)

M16 Square GM Test Washer Zinc

This M16 zinc plated hardened square test washer is suitable for torque-tension certification tests performed to the following specs:

  • GMW16722
  • GM7112M
  • GMW4707

SKU: SFM016HZ
Alt. Part Number: 11502647

GM Test Bolt: 11570102

M10 X 1.50 X 60MM With M14 Hex Head GM ISO 16047 Test Bolt Plain

This plain PC 10.9 test bolt has an M10 body with the head of an M14. It is suitable for use in torque-tension, bearing surface characteristics, and coefficient of friction tests performed to the following specs:

  • GMW3044
  • GMW3179
  • GMW3359
  • GMW16730
  • ISO 16047

SKU: 11570102

GM Test Washer: SFM010ALUM

M10 Square Aluminum Test Washer Plain

This square aluminum test washer is made to General Motors specifications and is suitable for bearing surface tests performed to the following GM Specs:

  • GMW3044
  • GMW3359

SKU: SFM010ALUM

GM Test Washer: SFM010SCEC

M10 Square Non-Hardened Test Washer ELPO E-Coat

This square non-hardened test washer is made to General Motors specifications and is suitable for bearing surface tests performed to the following GM Specs:

  • GMW3044
  • GMW3359

SKU: SFM010SCEC

GM Test Bolt: HHM10150060-WZ102

M10 X 1.50 X 60MM PC10.9 Hex Head ISO 16047

This M10 plain PC 10.9 test bolt has a slightly larger head than a regular M10 test bolt. The head flats measure 16mm across. It is suitable for use in torque-tension and bearing surface characteristics tests performed to the following specs:

  • GMW3179
  • GMW3284
  • GMW3359
  • GMW16730
  • ISO 16047
  • ISO 2320

SKU: HHM10150060-WZ102
Alt. Part Number: HHM10150060-ISO4014

GM Test Nut: 11611982

M10 X 1.50 Class 10 General Motors / ISO 16047

This M10 class 10 test nut has a plain finish and is suitable for use in torque-tension and coefficient of friction tests performed to the following specs:

  • GMW3179
  • GMW3359
  • GMW3044
  • GMW16730
  • ISO 16047

SKU: 11611982

GM Test Nut: 11611982-S437

M10 X 1.50 Class 10 Ford WZ 102 Hex Test Nut Zinc S437

This M10 X 1.50 class 10 test nut has a zinc S437 finish and is suitable for Torque-Tension Testing per Ford WZ 102.

  • Class 10
  • Zinc S437 Finish

SKU: 11611982-S437

Test Washer: 11611945

M10 Square GM ISO 16047 Type HL Test Washer Plain

This M10 square test washer has a plain finish and is suitable for use in torque-tension and coefficient of friction tests performed to the following specs:

  • GMW3179
  • GMW3359
  • GMW3044
  • GMW16730
  • ISO 16047

SKU: 11611945

GM Test Washer Type H: NPN4

M10 Square Test Washer Plain Type HH

This M10 Type HH test washer has a plain finish and is suitable for use in torque-tension and coefficient of friction tests performed to the following specs:

  • GMW3284
  • GMW3044
  • ISO 16047
  • ISO 2320

SKU: NPN4