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National Stock Number:
5310-01-058-3991
Federal Supply Class:
5310
National Item Identification Number:
010583991
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:
| 928C961P18 | 89954 | BAE SYSTEMS CONTROLS INC. |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.188 INCHES MINIMUM AND 0.192 INCHES MAXIMUM | | OVERALL DIAMETER | 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-766,TEMPER FULL HARD,FINISH NO. 2B FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766,TEMPER 1/2 HARD,FINISH NO. 2B FED SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 301 OR STEEL COMP 302 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND MIL-C-13924,CL 2 MIL SPEC 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE AND OXIDE FILM OVERALL | | THICKNESS | 0.014 INCHES MINIMUM AND 0.016 INCHES MAXIMUM |
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