The basic shape is octagonal; the aperture is octagonal; two opposite sides have a length of 1.38o in. And the other six sides have a length of 0.994 to 1.014 in.
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.
Classification: Articles of aluminum nesoi
NSN 5910-00-544-7448
NSN 6135-01-278-9717
NSN 6130-01-432-5175
NSN 5990-01-439-4643
NSN 5905-00-929-5916
NSN 6220-01-320-2641
NSN 5915-01-104-4044
NSN 4140-01-284-3198
NSN 6150-00-232-1962
NSN 5950-00-555-2881
NSN 5945-00-376-4930
NSN 5960-00-078-1643