National Item Identification Number
01-528-0292
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)
2V507
MC MASTER-CARR SUPPLY COMPANY
473 RIDGE RD
DAYTON
NJ
08810
732-329-3200
38428
SHANAHANS MFG LTD
8400 124TH ST
SURREY
V3W 6K1
CANADA
604-591-5111
Reference Numbers (Part Numbers)
98370A019
98370A019
Required Categories
MATERIAL
COLOR
HARDNESS RATING
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
OVERALL
Required Description
STEEL CORROSION RESISTING OVERALL
NATURAL OVERALL
70.0 ROCKWELL B NOMINAL
0.4