5310-01-273-1641, WASHER,FLAT

National Stock Number:
5310-01-273-1641

Federal Supply Class:
5310

National Item Identification Number:
012731641

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:

MS51496T47

96906

MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HARDNESS RATING	57.0 ROCKWELL B MINIMUM AND 77.0 ROCKWELL B MAXIMUM
HOLE DIAMETER	0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM
OVERALL DIAMETER	0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-B-613 FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIAL	COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OR COPPER ALLOY 272 OR COPPER ALLOY 274 OR COPPER ALLOY 280 OR COPPER ALLOY 330 OR COPPER ALLOY 331 OR COPPER ALLOY 332 OR COPPER ALLOY 335 OR COPPER ALLOY 340 OR COPPER ALLOY 342 OR COPPER ALLOY 344 OR COPPER ALLOY 347 OR COPPER ALLOY 348 OR COPPER ALLOY 350 OR COPPER ALLOY 353 OR COPPER ALLOY 356 OR COPPER ALLOY 360 OR COPPER ALLOY 370 OVERALL
PERIPHERAL SHAPE STYLE	ROUND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B545 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	TIN OVERALL
THICKNESS	0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM

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