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National Stock Number:
5310-01-213-8872
Federal Supply Class:
5310
National Item Identification Number:
012138872
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:
| FF-R-556 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | | MS51936-3 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.203 INCHES MINIMUM AND 0.208 INCHES MAXIMUM | | OVERALL DIAMETER | 0.623 INCHES MINIMUM AND 0.661 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY 11 OVERALL | | NONDEFINITIVE SPEC/STD DATA | F GRADE | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-495 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE FILM OVERALL | | THICKNESS | 0.054 INCHES MINIMUM AND 0.060 INCHES MAXIMUM |
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