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National Stock Number:
5310-00-688-1947
Federal Supply Class:
5310
National Item Identification Number:
006881947
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:
| 882256-001 | 56232 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 23.0 ROCKWELL B NOMINAL | | HOLE DIAMETER | 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM | | OVERALL DIAMETER | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | -QQ-A-250/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | ALUMINUM ALLOY 5052 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | -MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND -MIL-P-6889,TY 1 MIL SPEC 2ND TREATMENT RESPONSE AND -MIL-P-6889,TY 1 MIL SPEC 3RD TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE FILM AND ZINC AND CHROMATE OVERALL | | THICKNESS | 0.005 INCHES MINIMUM AND 0.015 INCHES MAXIMUM |
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