scope:

GENERAL: The product covered by this standard is normally referred to as "thru hardened" washers as contrasted to the case hardened variety. It has been determined by divisional survey that the range of sizes and thicknesses included should cover most company requirements.

Type A conforms essentially with ANSI Type A (Narrow) latest designation. Type B is thicker than Type A throughout all sizes and conforms in ID and OD to ANSI Type A (Narrow). Type C is thicker than Type B throughout all sizes and conforms in ID and OD to ANSI B 18.22.1. Type A (Narrow) from sizes 1/4 to 7/16, and to ASTM 325 (Structural Steel Washers) from sizes 1/2 to 2 inches. In all sizes shown, Type D is the same as Type C with the exception that the OD is proportionally larger throughout all sizes.

Dimensions are shown in decimal inch except for nominal shaft size where the industry practice of using fractional sizes is followed.

These washers are intended for use in high clamping loads, to minimize embedding, and to aid torquing.