National Item Identification Number
00-638-6888
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)
43491
GENERAL SIGNAL CORP
700 TERRACE POINT RD
MUSKEGON
MI
49440
203-329-4100
90166
18876
18876
90166
Reference Numbers (Part Numbers)
67A21
67A21
9090883-17
9090883L17
920004
Required Categories
MATERIAL
MATERIAL DOCUMENT AND CLASSIFICATION
SURFACE TREATMENT
HARDNESS RATI
Required Description
STEEL COMP 1040 OR
STEEL COMP 1541 OR
STEEL COMP 1042 OR
STEEL COMP 1043 OR;