National Item Identification Number

00-187-1864

National Stock Number

Item Name

WASHER,FLAT

Federal Supply Class

5310

Referenced on: http://compressors.tpub.com//TM-5-4930-207-34P/css/TM-5-4930-207-34P_179.htm

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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35301

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DRESSER INDUSTRIES INC
LEROI DIV
N MAIN AND RUSSELL RD
90
SIDNEY
OH
45365
937-498-2500

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NSN (National Stock Number) 5310-00-187-1864, 5310001871864 NIIN (National Identification Number) 00-187-1864, 001871864

Part Numbers (Reference Numbers)

20-316

Required Categories

MATERIAL
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
OVERALL DIAMETER
CENTER HOLE S

Required Description

STEEL OVERALL
0.250 INCHES NOMINAL
1 ROUND
0.500 INCHES NOMINAL
1 ROUND
1 R