National Item Identification Number
National Stock Number
WASHER,SHOULDERED AND RECESSED
Federal Supply Class
A washer, round in shape, having a centrally located hole. One bearing surface is flat, the other surface is in the form of a raised shoulder (boss) having a flat bearing surface. Either or both of the bearing surfaces must be broken by a counterbore, countersink, or similar shaped recess. The thickness of the shoulder (boss) must not exceed 25 percent of the shoulder (boss) diameter. For items having a shoulder (boss) of greater thickness, use BEARING, SLEEVE; BUSHING, SLEEVE; or SPACER, SLEEVE. Excludes INSULATOR, WASHER and thrust type washers.
Commercial and Government Entity Code (Supplier Data)
NSN (National Stock Number) 5310-01-160-2055, 5310011602055 NIIN (National Identification Number) 01-160-2055, 011602055
Part Numbers (Reference Numbers)