A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).
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Dept. of the Navy 
Canada 
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Republic of Korea 
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Norway Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5999-01-093-7158
NSN 5895-00-269-2697
NSN 6145-01-091-7015
NSN 6650-01-343-8008
NSN 6145-01-492-0844
NSN 6150-01-537-9560
NSN 6110-01-318-6537
NSN 6650-01-327-4122
NSN 5930-00-291-5400
NSN 6650-01-420-5586
NSN 5975-00-574-0855
NSN 5930-00-804-1848