5/16" I.D Carbon Steel, Cadmium plated finish, 0.063" Thick, National Aeronautical Standard Flat Washer
NAS1149F flat washers are used under nuts to provide a smooth bearing surface, as shims to obtain the correct grip length for a bolt and nut assembly.
*Superseeds AN960-516 part number*
Bolt Size: 5/16"
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