5310-99-549-4415, WASHER,FLAT

National Stock Number:
5310-99-549-4415

Federal Supply Class:
5310

National Item Identification Number:
995494415

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:

BS4320	K7766	BRITISH STANDARDS INSTITUTION
G414/4606 ITEM 9	K7705	KNDS DEFENCE UK LIMITED
G414/4606/9	K7705	KNDS DEFENCE UK LIMITED

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HOLE DIAMETER	8.40 MILLIMETERS MINIMUM AND 8.70 MILLIMETERS MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	W.F.E.L.S.SPECIFICATION 720 CLASS G MFR REF SINGLE MATERIAL RESPONSE
MATERIAL	STEEL
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	16.60 MILLIMETERS MINIMUM AND 17.00 MILLIMETERS MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DEF STAN 03-20 MIL SPEC 1ST TREATMENT RESPONSE AND DEF STAN 03-20 MIL SPEC 2ND TREATMENT RESPONSE AND DEF SPEC 130 MIL SPEC 3RD TREATMENT RESPONSE AND WILLIAMS FAIREY ENGINEERING LTD W.I.108 MFR REF SINGLE TREATMENT RESPONSE
SURFACE TREATMENT	ZINC AND CHROMATE AND PASSIVATE AND PAINT
THICKNESS	1.40 MILLIMETERS MINIMUM AND 1.80 MILLIMETERS MAXIMUM

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