Color yellow federal standard 595 no. 23538
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).
Classification: Other articles of iron or steel not wire nesoi
NSN 6110-01-529-6332
NSN 6620-01-204-0605
NSN 5999-01-488-7618
NSN 5996-00-062-6212
NSN 6645-00-192-1152
NSN 5960-00-926-2637
NSN 6105-00-733-9226
NSN 5930-00-919-8050
NSN 6685-01-564-9421
NSN 5996-01-023-8370
NSN 6620-01-408-4464
NSN 5910-00-122-3733