5310-99-856-8356, WASHER,FLAT

National Stock Number:
5310-99-856-8356

Federal Supply Class:
5310

National Item Identification Number:
998568356

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
G413/4591 ITEM 19	K7705	KNDS DEFENCE UK LIMITED
G413/4591/19	K7705	KNDS DEFENCE UK LIMITED
W6060121	K7705	KNDS DEFENCE UK LIMITED

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HARDNESS RATING	157.00 BRINELL STANDARD MINIMUM
HOLE DIAMETER	21.00 MILLIMETERS MINIMUM AND 21.50 MILLIMETERS MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	WILLIAM FAIREY LTD SPEC W.F.E.L.S 720 CLASS G MFR REF SINGLE MATERIAL RESPONSE
MATERIAL	STEEL
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	36.20 MILLIMETERS MINIMUM AND 37.00 MILLIMETERS MAXIMUM
SPECIAL FEATURES	BRINELL HARDNESS NUMBER 157 MINIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DEF STAN 03-20 MIL STD 1ST TREATMENT RESPONSE AND YELLOW DEF.SPEC 130 MIL STD 2ND TREATMENT RESPONSE
SURFACE TREATMENT	ZINC AND PASSIVATE
THICKNESS	2.70 MILLIMETERS MINIMUM AND 3.30 MILLIMETERS MAXIMUM

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