5310-01-370-8287 WASHER,FLAT Index 5310-01-370-8289 WASHER,FLAT

National Stock Number:
5310-01-370-8288

Federal Supply Class:
5310

National Item Identification Number:
013708288

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:
A312A296-10188818KEARFOTT CORPORATION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.156 INCHES MINIMUM
OVERALL DIAMETER0.390 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 301 OR STEEL COMP 302 OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THICKNESS0.0045 INCHES MINIMUM AND 0.0055 INCHES MAXIMUM


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