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National Stock Number:
5310-00-723-9484
Federal Supply Class:
5310
National Item Identification Number:
007239484
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:
| S6135-20398-1 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | COLOR | BLACK OVERALL | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM | | HEAT TREATMENT | NORMALIZED AND TEMPERED | | HOLE DIAMETER | 0.495 INCHES MINIMUM AND 0.500 INCHES MAXIMUM | | OVERALL DIAMETER | 0.778 INCHES MINIMUM AND 0.782 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4130 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE FINISH | 100.0 MICROINCHES ALL SURFACES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE FILM OVERALL | | THICKNESS | 0.100 INCHES NOMINAL |
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