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National Stock Number:
5310-00-068-0218
Federal Supply Class:
5310
National Item Identification Number:
000680218
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:
| 680218 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 8644352 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| MATERIAL | RUBBER SYNTHETIC OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 417,GR SB415A1B1C2B7 MIL STD SINGLE MATERIAL RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.406 INCHES NOMINAL | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 1.513 INCHES NOMINAL | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.063 INCHES NOMINAL | | HARDNESS RATING | 35.0 SHORE DUROMETER A MINIMUM AND | | 45.0 SHORE DUROMETER A MAXIMUM | | MINIMUM TENSILE STRENGTH | 1500 POUNDS PER SQUARE INCH |
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