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National Stock Number:
5310-01-188-8258
Federal Supply Class:
5310
National Item Identification Number:
011888258
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:
| SS5072-6H | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| MATERIAL | ALUMINUM ALLOY 2024 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/5,COND T3 OR T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ANODIZE OR | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-S-8625 MIL SPEC 1ST TREATMENT RESPONSE AND | | MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.192 INCHES MINIMUM AND | | 0.197 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 0.433 INCHES MINIMUM AND | | 0.458 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.028 INCHES MINIMUM AND | | 0.036 INCHES MAXIMUM | | HEAT TREATMENT | T-3 SOLUTION HEAT TREATED, COLD WORKED OR | | T-4 SOLUTION HEAT TREATED, NATURAL AGED |
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