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National Stock Number:
5310-01-499-6575
Federal Supply Class:
5310
National Item Identification Number:
014996575
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:
| SS52H0281Z0500 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.500 INCHES NOMINAL | | OVERALL DIAMETER | 0.281 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-22499, COMPOSITION 3, TYPE 302 MIL SPEC 1ST MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SPECIAL FEATURES | WASHER WITH .002 LAMINATION ON .032 SOLID STOCK | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 5516 MIL SPEC 1ST TREATMENT RESPONSE OR AMS 5903 MIL SPEC 1ST TREATMENT RESPONSE OR AMS 5904 MIL SPEC 1ST TREATMENT RESPONSE OR AMS 5905 MIL SPEC 1ST TREATMENT RESPONSE OR AMS 5906 MIL SPEC 1ST TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PLASTIC POLYURETHANE OVERALL | | THICKNESS | 0.090 INCHES NOMINAL |
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