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National Stock Number:
5310-99-579-7972
Federal Supply Class:
5310
National Item Identification Number:
995797972
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:
| BS4320 M6 | K7766 | BRITISH STANDARDS INSTITUTION | | G121/5522 ITEM 7 | K7705 | KNDS DEFENCE UK LIMITED | | G121/5522/7 | K7705 | KNDS DEFENCE UK LIMITED | | W6030113 | K7705 | KNDS DEFENCE UK LIMITED |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | COLOR | YELLOW OVERALL | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 6.40 MILLIMETERS MINIMUM AND 6.70 MILLIMETERS MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | BS 1449, PART 1 CS4 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 12.10 MILLIMETERS MINIMUM AND 12.50 MILLIMETERS MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MOD DEFSTAN 03-20 NATIONAL SPEC 1ST TREATMENT RESPONSE OVERALL AND MOD DEFSTAN 03-33 NATIONAL SPEC 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ZINC OVERALL AND PASSIVATE OVERALL | | THICKNESS | 1.40 MILLIMETERS MINIMUM AND 1.80 MILLIMETERS MAXIMUM |
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