Hardened Round Washers

The major use of washers is to provide a smooth bearing surface. Washers are generally used at the basal part of the head of a nut / bolt. The chemical, mechanical, and dimensional requirements with regards to hardened washers are covered under the ASTM specification F436. These washers are completely hardened / carburized to add strength, but they appear to be physically smaller when compared to the standard F844 flat washers. Except for low carbon steel bolts, these hardened washers are expert recommended washers to suit any other fastener.

Stock

Diameters: 1/2″ – 2-3/4″
Origin: Domestic
Finish: Plain and hot-dip galvanized

Dimensions

Click table to show drawingWasher
Bolt SizeBACWeight (lbs.) Per 1000 PiecesPart Numbers
Outside DiameterInside DiameterThicknessDomestic
MinMaxPlainGalvanized
1⁄211⁄1617⁄320.0970.177181644016441
5⁄815⁄1611⁄160.1220.177331644216443
3⁄4115⁄3213⁄160.1220.177411644416445
7⁄813⁄415⁄160.1360.177641644616447
1211⁄160.1360.177821644816449
11⁄821⁄413⁄160.1360.1771051645016451
11⁄421⁄213⁄80.1360.1771331645216453
13⁄823⁄411⁄20.1360.1771631645416455
11⁄2315⁄80.1360.1772001645616457
15⁄831⁄413⁄40.1780.2832019481*19482*
13⁄433⁄817⁄80.1780.283071645816459
17⁄831⁄220.1780.2836016471*16472
233⁄421⁄80.1780.283801646016461
21⁄4423⁄80.240.345601646216463
21⁄241⁄225⁄80.240.347201646416465
23⁄4527⁄80.240.349201661116612
351⁄231⁄80.240.3410401661316614
31⁄4633⁄80.240.341350––
31⁄261⁄235⁄80.240.3416331849018460
33⁄4737⁄80.240.341880––
471⁄241⁄80.240.3422001846118462
Dimensions per ASTM F436
*Usually domestic