National Item Identification Number
01-031-8410
National Stock Number
Item Name
WASHER,SHOULDERED AND RECESSED
Federal Supply Class
5310
Description
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)
Reference Numbers (Part Numbers)
2498571
Required Categories
MATERIAL
SURFACE TREATMENT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
COLO
Required Description
STEEL COMP 4140H OVERALL
OXIDE FILM OVERALL
MIL-C-13924,CLASS 1 MIL SPEC SINGL