A flat metal or plastic item of various peripheral shapes having a solid (not laminated) cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole having a solid rectangular cross-section use disk, solid, plain. For round or hexagonal items with only one hole centrally located and with the length (thickness) exceeding 25 percent of the outside diameter or distance across peripheral flats, see spacer, sleeve. The thickness between the two parallel bearing surfaces must be 0.006 inch, (0.152 mm) or more for items less than 1/4 inch (6.35 mm) across the peripheral diameter, or smallest overall outside dimension, or must be 0.016 inch (0.406 mm) or more for items 1/4 inch (6.35 mm) or greater across the peripheral diameter or smallest overall outside dimension. For items with a thickness less than those indicated above, see shim. For items with one hole centrally located conforming to the above dimensional criteria use washer, flat or spacer, ring as applicable. When thickness and/or outside diameter or smallest overall outside dimension is designated as a tolerance/dimension the maximum dimension will be used to determine compliance. Excludes gasket; insulator (as modified) and mounting pad, electrical-electronic component.
Republic of Korea 
Greece 
Turkey Classification: Other articles of iron or steel not wire nesoi
NSN 6105-01-035-9190
NSN 6610-01-383-3780
NSN 5950-01-651-0496
NSN 6150-01-170-4065
NSN 5905-01-362-1434
NSN 5998-01-660-5587
NSN 6135-00-182-7008
NSN 5855-01-023-3727
NSN 5960-01-175-7309
NSN 6105-00-522-4123
NSN 6620-01-385-6172
NSN 5996-01-164-6758