National Item Identification Number
01-533-5440
National Stock Number
Item Name
WASHER,FLAT
Federal Supply Class
5310
Description
A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items.
Commercial and Government Entity Code (Supplier Data)
05NF7
POWER SYSTEMS INTERNATIONAL INC
860 DOUGLAS WAY
NATURAL BRIDGE STATION
VA
24579
540-291-4501
7U571
REVCAR FASTENERS INC
3845 THIRLANE RD NW
ROANOKE
VA
24019
540-561-6562
Reference Numbers (Part Numbers)
3000396-311
50NWUSOZ/GR5
Required Categories
MATERIAL
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
OVERALL DIAMETER
CENTER HOLE S
Required Description
STEEL CORROSION RESISTING OVERALL
0.500 INCHES NOMINAL
1 ROUND
1.375 INCHES N