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 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)
0.312 INCHES NOMINAL
0.844 INCHES NOMINAL