7490-00-996-3173 DIPPER,INK,LEATHER Index 7490-00-996-3179 RUBBER,IMPRESSION

National Stock Number:
5310-00-996-3178

Federal Supply Class:
5310

National Item Identification Number:
009963178

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:
FFW9281348FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY MATERIAL AND DIM.
HOLE DIAMETER0.227 INCHES NOMINAL
OVERALL DIAMETER0.500 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 304 OVERALL
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1 GRADE AND 2 CLASS
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENTPASSIVATE OVERALL
THICKNESS0.050 INCHES NOMINAL


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