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National Stock Number:
5310-00-298-0125
Federal Supply Class:
5310
National Item Identification Number:
002980125
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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Techincal Specification:
| MATERIAL | RUBBER SYNTHETIC OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 417,TY S,CL SC,GR SC270 MIL STD SINGLE MATERIAL RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 1.453 INCHES MINIMUM AND | | 1.485 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 1.984 INCHES MINIMUM AND | | 2.016 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.115 INCHES MINIMUM AND | | 0.135 INCHES MAXIMUM | | HARDNESS RATING | 65.0 SHORE DUROMETER A MINIMUM AND | | 75.0 SHORE DUROMETER A MAXIMUM | | MINIMUM TENSILE STRENGTH | 2000 POUNDS PER SQUARE INCH |
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