National Item Identification Number
01-357-4701
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)
82187
NATIONAL WEATHER SERVICE
DIV OFFICE OF HYDROLOGIC DEVELOPMENT
1325 EAST-WEST HWY 18150
SILVER SPRING
MD
20910
301-713-0640
Reference Numbers (Part Numbers)
B422-2A8H1-SD001/C
Required Categories
MATERIAL
HOLE DIAMETER
OVERALL DIAMETER
CENTER HOLE SHAPE STYLE
CROSS-SECTIO
Required Description
PLASTIC NYLON OVERALL
0.195 INCHES NOMINAL
0.375 INCHES NOMINAL
1 ROUND
1 RE