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National Stock Number:
5310-01-074-2100
Federal Supply Class:
5310
National Item Identification Number:
010742100
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:
| 642AS4240 | 30003 | NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.126 INCHES MINIMUM AND 0.129 INCHES MAXIMUM | | OVERALL DIAMETER | 0.213 INCHES MINIMUM AND 0.223 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS4507 1/2HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-14550 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-T-10727,TYPE 1 MIL SPEC 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | TIN AND COPPER OVERALL | | THICKNESS | 0.011 INCHES MINIMUM AND 0.021 INCHES MAXIMUM |
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