5310-00-999-8288 WASHER,FLAT Index 5310-00-999-8291 WASHER,FLAT

National Stock Number:
5310-00-999-8289

Federal Supply Class:
5310

National Item Identification Number:
009998289

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:
9M988611083CATERPILLAR INC
9M988625496HOLT BROS
9M9886-0058312MIL-TECH MFG INC


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.750 INCHES NOMINAL
OVERALL DIAMETER1.230 INCHES MINIMUM AND 1.270 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION1E357,FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.030 INCHES NOMINAL


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