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National Stock Number:
5310-00-381-1637
Federal Supply Class:
5310
National Item Identification Number:
003811637
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:
| 140-019-1 | 97499 | BELL TEXTRON INC |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.255 INCHES MINIMUM AND 0.265 INCHES MAXIMUM | | OVERALL DIAMETER | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,T3,T4 OR T351 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-200/3,T3,T3510 OR T3511 FED SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | ALUMINUM ALLOY 2024 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SPECIAL FEATURES | OD HAS A 0.020 IN. MIN 0.030 IN. MAX RADIUS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ANODIZE OVERALL | | THICKNESS | 0.060 INCHES MINIMUM AND 0.066 INCHES MAXIMUM |
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