5310-01-499-6575, WASHER,FLAT

National Stock Number:
5310-01-499-6575

Federal Supply Class:
5310

National Item Identification Number:
014996575

Description:
WASHER,FLAT

Detail:
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.

Manufacturer Information:

SS52H0281Z0500

78286

SIKORSKY AIRCRAFT CORPORATION

Techincal Specification:

MATERIAL	STEEL CORROSION RESISTING OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-22499, COMPOSITION 3, TYPE 302 MIL SPEC 1ST MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	PLASTIC POLYURETHANE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS 5516 MIL SPEC 1ST TREATMENT RESPONSE OR
	AMS 5903 MIL SPEC 1ST TREATMENT RESPONSE OR
	AMS 5904 MIL SPEC 1ST TREATMENT RESPONSE OR
	AMS 5905 MIL SPEC 1ST TREATMENT RESPONSE OR
	AMS 5906 MIL SPEC 1ST TREATMENT RESPONSE OVERALL
CENTER HOLE SHAPE STYLE	ROUND
HOLE DIAMETER	0.500 INCHES NOMINAL
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	0.281 INCHES NOMINAL
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
THICKNESS	0.090 INCHES NOMINAL
SPECIAL FEATURES	WASHER WITH .002 LAMINATION ON .032 SOLID STOCK

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