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National Stock Number:
5310-01-487-2231
Federal Supply Class:
5310
National Item Identification Number:
014872231
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:
| 501-7055651 ITEM 121 | 53711 | NAVAL SEA SYSTEMS COMMAND | | DELRIN 100 4.250DIA | 18873 | DU PONT E I DE NEMOURS AND CO INC SECURITY DIRECTOR/LEGAL DEPT |
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Techincal Specification:
| OVERALL DIAMETER | 4.250 INCHES NOMINAL | | MATERIAL | PLASTIC ACETAL OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SPECIAL FEATURES | SPECIFIC MATL IS DELRIN 100 DU PONT | | SUPPLEMENTARY FEATURES | SLIDE WASHER |
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