5310-99-607-7741, WASHER,FLAT

5340-99-607-7763 CAP,PROTECTIVE,DUST AND MOISTURE

National Stock Number:
5310-99-607-7741

Federal Supply Class:
5310

National Item Identification Number:
996077741

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:

870-50494

K7705

KNDS DEFENCE UK LIMITED

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HOLE DIAMETER	0.360 INCHES MINIMUM AND 0.422 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	BS 970 PART 1 GRADE 070-20 NORMALISED NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM
SPECIAL FEATURES	PLATING THICKNESS(HEAVY) 0.025- 0.040 MM
SURFACE FINISH	250.0 MICROINCHES ALL SURFACES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DEF STAN 03-20 NATIONAL SPEC 1ST TREATMENT RESPONSE OVERALL AND DEF 130 NATIONAL SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	ZINC OVERALL AND PASSIVATE OVERALL
THICKNESS	0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM

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