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National Stock Number:
5310-00-763-1440
Federal Supply Class:
5310
National Item Identification Number:
007631440
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:
| 10106833 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | COLOR | RED OVERALL | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HEAT TREATMENT | H-32 STRAIN HARDENED, STABILIZED TO 1/4 HARD | | HOLE DIAMETER | 2.437 INCHES NOMINAL | | OVERALL DIAMETER | 3.375 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-258/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | ALUMINUM ALLOY 5052 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-8585 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE AND TT-E-489 CLASS B FED SPEC 3RD TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PRIMER AND CHROMATE AND PAINT OVERALL | | THICKNESS | 0.059 INCHES MINIMUM AND 0.067 INCHES MAXIMUM |
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