Product Details | FLAT WASHER

5310-00-639-7553 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.

Part Alternates: FFW92, FFW92TYPEAGRADE1CLASSAMEDIUM, 5310-00-639-7553, 00-639-7553, 5310006397553, 006397553

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 01 JAN 1963 00-639-7553

Drawings & Photos | NSN 5310-00-639-7553


Demand History | NSN 5310-00-639-7553

Part Number Request Date QTY Origin
FFW92 2018-07-207 2 United States
FFW92 2016-08-217 21 US
FFW92 2011-10-304 495 United States

Cross Reference | NSN 5310-00-639-7553

Part Number Cage Code Manufacturer
FFW92 81348 FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES
FFW92TYPEAGRADE1CLASSAMEDIUM 81348 FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES

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Technical Data | NSN 5310-00-639-7553

Characteristic Specifications
MATERIAL STEEL OVERALL
SURFACE TREATMENT ZINC OVERALL
HOLE DIAMETER 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
PERIPHERAL SHAPE STYLE 1 ROUND
OVERALL DIAMETER 0.557 INCHES MINIMUM AND 0.577 INCHES MAXIMUM
CENTER HOLE SHAPE STYLE 1 ROUND
CROSS-SECTIONAL SHAPE STYLE 1 RECTANGULAR
THICKNESS 0.036 INCHES MINIMUM AND 0.065 INCHES MAXIMUM
NONDEFINITIVE SPEC/STD DATA A TYPE AND 1 GRADE AND A CLASS
MANUFACTURERS CODE 81348
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE FFW92
MANUFACTURERS CODE 81348
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE FFW92TYPEAGRADE1CLASSAMEDIUM

Restrictions/Controls & Freight Information | NSN 5310-00-639-7553

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information