5310-01-021-0897 WASHER,FLAT Index 5330-01-021-0899 RETAINER,PACKING

National Stock Number:
5310-01-021-0898

Federal Supply Class:
5310

National Item Identification Number:
010210898

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:
1165754819207U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
85356540GDP5AERO BRAKE & SPARES INC
90744-01212335PRINCE VALVE INC
95256540GTG2LORAL CORP AIRCRAFT BRAKING SYSTEMS DIV
952565425500LOCKHEED MARTIN CORPORATION
952565473842GOODYEAR TIRE AND RUBBER CO THE
99010534623AM GENERAL LLC


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.759 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 4140 OVERALL
PERIPHERAL SHAPE STYLEROUND
PROPRIETARY CHARACTERISTICSPACS
OVERALL DIAMETER1.250 INCHES NOMINAL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TY 2, CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL AND CHROMATE OVERALL
THICKNESS0.250 INCHES NOMINAL


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