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National Stock Number:
5310-00-343-9507
Federal Supply Class:
5310
National Item Identification Number:
003439507
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.
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Manufacturer Information:
| 22304 | 0Y4A4 | WALTHAM AIRCRAFT CLOCK CORP | | 22304 | 79300 | WALTHAM CLOCK CO INC | | 65001915 | 0Y4A4 | WALTHAM AIRCRAFT CLOCK CORP | | 65001915 | 79300 | WALTHAM CLOCK CO INC |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM | | OVERALL DIAMETER | 0.145 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | 22304 FSCM 79300 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-6859 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | NICKEL OVERALL | | THICKNESS | 0.012 INCHES NOMINAL |
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