National Item Identification Number

01-073-9221

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)

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75915

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LITTELFUSE INC
SUB OF TRACOR INC
800 E NORTHWEST HWY
DES PLAINES
IL
60016
800-548-4489

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Reference Numbers (Part Numbers)

NAS1515C4
NAS1580C3T12P
901-161-001

Required Categories

MATERIAL
MATERIAL DOCUMENT AND CLASSIFICATION
HARDNESS RATING
HOLE DIAMETER;

Required Description

RUBBER SYNTHETIC OVERALL
MIL-R-6855 CL 1 GRADE 60 MIL SPEC SINGLE MATERIAL RESP