5310-99-796-9884, WASHER,FLAT

National Stock Number:
5310-99-796-9884

Federal Supply Class:
5310

National Item Identification Number:
997969884

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:

MD 31623-3464	K0349	M L AVIATION LTD INCORPORATING M L WALLOP DEFENCE SYSTEMS LTD
MD 31623-3464	K4234	CURTISS-WRIGHT FLOW CONTROL (UK) LTD
MD31623-3464	0NCA9	M L AVIATION LTD
MD31623-3464	K0349	M L AVIATION LTD INCORPORATING M L WALLOP DEFENCE SYSTEMS LTD
MD 31623-3464 A3	K0349	M L AVIATION LTD INCORPORATING M L WALLOP DEFENCE SYSTEMS LTD
MD 31623-3464 A3	K4234	CURTISS-WRIGHT FLOW CONTROL (UK) LTD

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CRITICALITY CODE JUSTIFICATION	AAUB
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
HOLE DIAMETER	0.5625 INCHES MINIMUM AND 0.5645 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	BSI BS S143 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL CORROSION RESISTING OVERALL
PERIPHERAL SHAPE STYLE	ROUND
OVERALL DIAMETER	0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM
SURFACE FINISH	63.0 MICROINCHES INNER
SURFACE FINISH	63.0 MICROINCHES OUTER
SURFACE FINISH	32.0 MICROINCHES BOTTOM
SURFACE FINISH	32.0 MICROINCHES TOP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ML AVIATION LTD PS13001 TYPE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THICKNESS	0.041 INCHES MINIMUM AND 0.042 INCHES MAXIMUM

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