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National Stock Number:
5310-00-246-8772
Federal Supply Class:
5310
National Item Identification Number:
002468772
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:
| 61H492-3 | 48521 | COLT INDUSTRIES OPERATING CORP PRATT AND WHITNEY MACHINE TOOL DIV | | 61H492-3 | 79500 | WESTINGHOUSE ELECTRIC CORP | | AN902-3 | 88044 | AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY THE MATERIAL | | HARDNESS RATING | 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM | | HOLE DIAMETER | 0.294 INCHES MINIMUM AND 0.309 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 3212 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | RUBBER SYNTHETIC OVERALL | | MINIMUM TENSILE STRENGTH | 1700 POUNDS PER SQUARE INCH | | OVERALL DIAMETER | 0.441 INCHES NOMINAL | | PERIPHERAL SHAPE STYLE | ROUND | | THICKNESS | 0.061 INCHES MINIMUM AND 0.076 INCHES MAXIMUM |
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