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National Stock Number:
5310-99-397-4415
Federal Supply Class:
5310
National Item Identification Number:
993974415
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:
| BS3410 TABLE 4 | K7766 | BRITISH STANDARDS INSTITUTION | | G101/5585 ITEM 15 | K7705 | KNDS DEFENCE UK LIMITED | | G101/5585/15 | K7705 | KNDS DEFENCE UK LIMITED | | W7031723 | K7705 | KNDS DEFENCE UK LIMITED |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 1.026 INCHES MINIMUM AND 1.031 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | BS 1449 EN2 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL OR BS1449 PART 1 CR4 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 2.115 INCHES MINIMUM AND 2.125 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DEF-STAN 03-20 NATIONAL SPEC 1ST TREATMENT RESPONSE OVERALL AND DEF STAN 130 NATIONAL SPEC 2ND TREATMENT RESPONSE OVERALL AND W.I.0911AJHB MFR REF 3RD TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ZINC OVERALL AND CHROMATE OVERALL AND PAINT OVERALL |
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