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Test Nuts & Washers

Nuts & Washers for Torque-Tension & Bearing Surface Testing

Wilson-Garner stocks a number of test nuts and washers to suit OEM torque-tension and bearing surface test products. As your experienced resource for custom fasteners and high-quality test products, we proudly stock nuts and washers that meet specifications for General Motors, Ford, Chrysler, and John Deere tests, as well as parts for tests based on ISO 16047.


Test Nuts

Wilson-Garner stocks and supplies the consistent, well-constructed nuts you need for torque-tension and bearing surface testing. Our test nuts feature certifications on property class, surface treatment, and materials, and we offer a range of test nuts that suit specifications from large OEM manufacturers. All Wilson-Garner test nuts are certified and completely traceable by lot.

Our standard test nut stock sizes are indicated below.

Stock Test Nuts — Metric Sizes

M6 thru M16ISO 898-2Plain
M6 thru M16Class 10Zinc

Stock Test Nuts — Imperial Sizes

¼" thru ¾"GM-286-M Coarse and Fine ThreadPlain

Test Washers

Every test washer Wilson-Garner stocks is made in America, so you can count on consistency and quality. We stock a range of hardened and non-hardened square test washers for torque-tension and bearing surface tests on locknuts, coatings, and adhesive patches. Many of our washers meet specifications from large OEM manufacturers, and we supply test washers outside of these specifications as well.

Wilson-Garner test washers are certified and completely traceable by lot. Certifications include material, property class, and surface treatment. Available stock test washer sizes include:

Stock Test Washers — Metric Sizes

M6 thru M24Plain or Zinc Plated

Stock Test Washers — Imperial Sizes

¼" thru 1"Plain or Zinc Plated