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National Stock Number:
5310-00-166-1438
Federal Supply Class:
5310
National Item Identification Number:
001661438
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:
| 39451 | 77445 | RTX CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 76.0 ROCKWELL SUPERFICIAL 30-T MINIMUM OR 83.0 ROCKWELL SUPERFICIAL 30-T MAXIMUM | | HOLE DIAMETER | 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM | | OVERALL DIAMETER | 0.459 INCHES MINIMUM AND 0.479 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THICKNESS | 0.028 INCHES MINIMUM AND 0.035 INCHES MAXIMUM |
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