Wilson-Garner manufactures Test Bolts and stocks Test Nuts and Test Washers for several General Motors tests, including torque-tension, bearing surface, coefficient of friction, and torsional yield tests. Test products need to be uniform from test to test, so we hold ourselves to exacting quality standards to ensure that you get consistent testing results time after time. In addition, based on customer feedback, we go the extra mile by re-rolling the threads on all of our test bolts after heat treat and surface finish to eliminate nicks or plating inconsistencies. We provide parts that conform to requirements of the following General Motors Engineering Standards:

  • GMW3044
  • GMW3359
  • GMW16722
  • GM7112M
  • GMW4707
  • GMW3179 Code G
  • GM6076M
  • GM6124M
  • GM6175M
  • GM6189P
  • GM6194
  • GMW25
Test Products from Wilson-Garner Company for General Motors torque-tension tests

Torque/Tension Certification Testing

GM7112M, GMW4707, & GMW3179 Code G

Thread Size Test Bolt Part Number Test Nut Part Number Test Washer Part Number
M6 x 1.00 11516103 11516088 11503952 (SFM006HZ)
M8 x 1.25 11516104 11516089 11502643 (SFM008HZ)
M10 x 1.50 11516105 11516090 11502644 (SFM010HZ)
M12 x 1.75 11516106 11516091 11502645 (SFM012HZ)
M14 x 2.00 11516107 11516092 11502646 (SFM014HZ)
M16 x 2.00 11516108 11516093 11502647 (SFM016HZ)

GMW 3044 / GMW 3359

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

Diagram of a General Motors torque-tension test set-up showing required part numbers.

Bearing Surface Characteristics Testing

GMW 3359

Test Bolt
Part Number
Test Nut
Part Number
Test Washer
Part Numbers
11570102 11516090 SFM010ALUM SFM010SCEC
M10 x 1.50 x 60mm
Class 10.9 – M14 Head
Plain Finish
M10 x 1.50
Style 1
Zinc Finish
M10 Square
Aluminum
M10 Square
ELPO Finish

Diagram of General Motors bearing surface test per GMW3359 showing required part numbers.

Coefficient of Friction Testing

GMW 3044 / GMW 3359 – per ISO 16047

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