5310-01-566-9850, WASHER,FLAT

National Stock Number:
5310-01-566-9850

Federal Supply Class:
5310

National Item Identification Number:
015669850

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:

10910174	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
12387327	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
12387327-28	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
12387327-28	80212	BAE SYSTEMS LAND & ARMAMENTS L.P.

Techincal Specification:

MATERIAL	STEEL COMP 4130 OR
	STEEL COMP 4140 OR
	STEEL COMP 8640 OR
	STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	A829 ASSN STD 1ST MATERIAL RESPONSE OR
	A322 ASSN STD 1ST MATERIAL RESPONSE OR
	A331 ASSN STD 1ST MATERIAL RESPONSE OR
	AMS 6350 ASSN STD 1ST MATERIAL RESPONSE OR
	AMS 6351 ASSN STD 1ST MATERIAL RESPONSE OR
	AMS 6345 ASSN STD 1ST MATERIAL RESPONSE OR
	A829 ASSN STD 2ND MATERIAL RESPONSE OR
	A322 ASSN STD 2ND MATERIAL RESPONSE OR
	A331 ASSN STD 2ND MATERIAL RESPONSE OR
	A829 ASSN STD 3RD MATERIAL RESPONSE OR
	A322 ASSN STD 3RD MATERIAL RESPONSE OR
	A331 ASSN STD 3RD MATERIAL RESPONSE OR
	A322 ASSN STD 4TH MATERIAL RESPONSE OR
	A331 ASSN STD 4TH MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	ZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-STD-171, 1.9.2.2 MIL STD SINGLE TREATMENT RESPONSE AND
	ASTM B633, TY II, CL 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
CENTER HOLE SHAPE STYLE	ROUND
HOLE DIAMETER	0.521 INCHES MINIMUM AND
	0.541 INCHES MAXIMUM
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	1.990 INCHES MINIMUM AND
	2.010 INCHES MAXIMUM
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
THICKNESS	0.202 INCHES MINIMUM AND
	0.216 INCHES MAXIMUM
HARDNESS RATING	33.0 ROCKWELL C MINIMUM AND
	38.0 ROCKWELL C MAXIMUM

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