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National Stock Number:
5310-01-040-4739
Federal Supply Class:
5310
National Item Identification Number:
010404739
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:
| 4BA | K7766 | BRITISH STANDARDS INSTITUTION |
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Techincal Specification:
| MATERIAL | STEEL OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DTD TO 904/C,FSCM K0195 MFR REF 1ST TREATMENT RESPONSE AND DEF130,FSCM K0195 MFR REF 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND PASSIVATE OVERALL |
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