National Item Identification Number
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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 raised to form a curved or spherical contour. See also WASHER (1), CONCAVE. Excludes BEARING, WASHER THRUST.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
AN-P-61 FED SPEC 1ST TREATMENT RESPONSE