5310-00-044-6494 WASHER,FLAT Index 5310-00-044-6539 WASHER,FLAT

National Stock Number:
5310-00-044-6521

Federal Supply Class:
5310

National Item Identification Number:
000446521

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:
MILW1085TYPEA81349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY SURFACE TREATMENT
HOLE DIAMETER0.8125 INCHES NOMINAL
OVERALL DIAMETER2.875 INCHES NOMINAL
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THICKNESS0.165 INCHES NOMINAL


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