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National Stock Number:
5310-00-331-3225
Federal Supply Class:
5310
National Item Identification Number:
003313225
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:
| 310-0420-000 | 79807 | WROUGHT WASHER MFG., INC. | | 7601702 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 8193347 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | 807241-00 | 32345 | DEFENSE REDUCTION AGENCY | | FF-W-92 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | | AN960B616 | 88044 | AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY SURFACE TREATMENT | | HOLE DIAMETER | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM | | OVERALL DIAMETER | 0.620 INCHES MINIMUM AND 0.645 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613 FED SPEC ALL MATERIAL RESPONSES OVERALL | | MATERIAL | COPPER ALLOY 268 OR COPPER ALLOY 11 OVERALL | | NONDEFINITIVE SPEC/STD DATA | A TYPE AND 2 GRADE AND E CLASS | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT | NICKEL OVERALL | | THICKNESS | 0.053 INCHES MINIMUM AND 0.073 INCHES MAXIMUM |
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