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National Stock Number:
5310-00-776-4504
Federal Supply Class:
5310
National Item Identification Number:
007764504
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:
| 7764504 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | HEXAGON | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE WIDTH ACROSS FLATS | 1.141 INCHES MINIMUM AND 1.172 INCHES MAXIMUM | | OVERALL DIAMETER | 2.734 INCHES MINIMUM AND 2.766 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | PERIPHERAL SHAPE STYLE | DEE | | SPECIAL FEATURES | ROUNDED PART OF CIRCUMFERENCE HAS 0.031 INCH BY 45 DEGREE CHAMFER ON ONE SIDE | | WIDTH | 2.328 INCHES MINIMUM AND 2.359 INCHES MAXIMUM | | SURFACE TREATMENT | CADMIUM OR ZINC OVERALL | | THICKNESS | 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM |
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