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National Stock Number:
5310-99-740-3131
Federal Supply Class:
5310
National Item Identification Number:
997403131
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:
| 7986 | B1384 | CLARK MASTS TEKSAM NV | | 7986 | K3456 | CLARK MASTS TEKSAM LTD | | 7986-A | K3456 | CLARK MASTS TEKSAM LTD |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.709 INCHES MINIMUM AND 0.729 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DEF-STAN 03-201AJHG NATIONAL SPEC ALL TREATMENT RESPONSES OVERALL | | SURFACE TREATMENT | ZINC OVERALL AND CHROMATE OVERALL | | THICKNESS | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM |
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