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National Stock Number:
5310-00-018-3256
Federal Supply Class:
5310
National Item Identification Number:
000183256
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:
| 8768758 | 19206 | ARMY, UNITED STATES DEPARTMENT OF THE BUSINESS DEVELOPMENT DBA WATERVLIET ARSENAL |
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Techincal Specification:
| HARDNESS RATING | 79.0 ROCKWELL A MINIMUM AND 84.5 ROCKWELL A MAXIMUM | | HEAT TREATMENT | AS FABRICATED | | OVERALL DIAMETER | 2.984 INCHES MINIMUM AND 3.000 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | THICKNESS | 0.195 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
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