National Item Identification Number

01-326-1052

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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7X677

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7X677

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NSN (National Stock Number) 5310-01-326-1052, 5310013261052 NIIN (National Identification Number) 01-326-1052, 013261052

Part Numbers (Reference Numbers)

15649277
474978
474978

Required Categories

MATERIAL
HARDNESS RATING
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
OVERALL DIAMET

Required Description

STEEL COMP 1050 OR
STEEL COMP 1551 OR
STEEL COMP 1552 OR
STEEL COMP 1053 OR;