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National Stock Number:
5310-00-058-1896
Federal Supply Class:
5310
National Item Identification Number:
000581896
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:
| 135B5669-2 | 05606 | GENERAL DYNAMICS-OTS, INC. | | 401507 | 28839 | TELEDYNE INDUSTRIES INC TELEDYNE POWER SYSTEMS DIV |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM | | HOLE DIAMETER | 0.376 INCHES MINIMUM AND 0.391 INCHES MAXIMUM | | OVERALL DIAMETER | 0.730 INCHES MINIMUM AND 0.770 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 TREATMENT | PHOSPHATE OVERALL | | THICKNESS | 0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM |
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