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 5999-01-173-2774
NSN 5998-00-180-2480
NSN 6685-00-096-1485
NSN 6645-01-381-6084
NSN 5925-01-507-2469
NSN 6105-01-375-9993
NSN 5855-01-398-0090
NSN 5945-01-233-3759
NSN 5855-01-258-6180
NSN 6150-01-584-7887
NSN 6645-00-799-9459
NSN 5895-01-425-1475