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.
Singapore 
Canada Classification: Other articles of iron or steel not wire nesoi
NSN 6320-01-334-9840
NSN 5895-00-973-5955
NSN 4140-01-599-9383
NSN 5915-01-172-4298
NSN 6320-01-315-2982
NSN 6110-01-121-7380
NSN 6130-01-056-9928
NSN 6610-01-348-0545
NSN 6130-01-604-2029
NSN 6650-00-395-8712
NSN 5920-01-114-9811
NSN 5855-01-298-2519