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National Stock Number:
5310-01-122-8523
Federal Supply Class:
5310
National Item Identification Number:
011228523
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:
| 4P29091-101A | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 2.005 INCHES MINIMUM AND 2.010 INCHES MAXIMUM | | OVERALL DIAMETER | 3.220 INCHES MINIMUM AND 3.280 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | ST-05-501 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL UNS K44220 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SPECIAL FEATURES | HEAT TREAT 280,000-300,000 PSI ULT TS | | SURFACE FINISH | 125.0 MICROINCHES ALL SURFACES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CC,CLASS 3 PER DS30000 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | THICKNESS | 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM |
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