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National Stock Number:
5310-00-045-9225
Federal Supply Class:
5310
National Item Identification Number:
000459225
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:
| A20531-1 | 42498 | DAR ELECTRONICS INC DBA NATIONAL RADIO CO | | A20531-1 | 71313 | VIKING TECHNOLOGIES, LTD. |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 82.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM | | HOLE DIAMETER | 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM | | OVERALL DIAMETER | 0.433 INCHES MINIMUM AND 0.443 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 302 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT | OXIDE FILM OVERALL | | THICKNESS | 0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM |
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