National Item Identification Number
00-481-0139
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)
D9182
75477
HOWDEN BUFFALO INC.
DIV HOWDEN BUFFALO INC. NEW
338 SOUTH BROADWAY
NEW PHILADELPHIA
OH
44663
330-339-1111
96169
Reference Numbers (Part Numbers)
4W-33551-4
4W33551P4
4W33551P4
58E151040P39
Required Categories
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
WIDTH ACROSS FLATS
CENTER HOLE SHAPE STY
Required Description
0.562 INCHES NOMINAL
10 SQUARE
1.375 INCHES NOMINAL
1 ROUND
1 RECTANGULAR
0