A thin flat metal or plastic item of various peripheral shapes having a solid or laminated cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole and having a solid rectangular cross-section use disk, solid, plain. Items with either (1) a solid (not laminated) cross-section, or (2) a non-separable laminated cross-section with one hole centrally located, must have a thickness less than 0.006 inch (0.152 mm) for items less than 1/4 inch (6.35 mm) outside diameter or shortest distance across peripheral flats, and less than 0.016 inch (0.406 mm) for items 1/4 inch (6.35 mm) or more outside diameter, or shortest distance across peripheral flats. for items with thickness greater than those indicated above, see spacer, plate; washer, flat and spacer, ring. when thickness and/or outside diameter or shortest distance across peripheral flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance. See also shim stock, laminated; shim stock assortment, gasket; and bearing, washer, thrust.
Dept. of the Navy 
Spain NSN 5975-01-198-7899
NSN 5835-01-500-9636
NSN 5996-00-226-5364
NSN 5930-01-057-5037
NSN 5985-01-258-4769
NSN 6135-01-159-9705
NSN 5960-01-423-2511
NSN 5915-01-411-6933
NSN 4140-01-086-0067
NSN 6105-00-932-5309
NSN 5945-01-066-7025
NSN 5930-01-310-8565