National Item Identification Number
National Stock Number
Federal Supply Class
A washer which is round with a centrally located hole. One bearing surface is smooth, flat, and unbroken, the other bearing surface is smooth, unbroken, and is recessed to form a curved or spherical contour. See also WASHER (1), CONVEX. Excludes WASHER (1), RECESSED and BEARING, WASHER, THRUST.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
MIL-C-13924, CL 1 MIL SPEC SINGLE TREATMENT RESPON