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National Stock Number:
5310-01-086-4921
Federal Supply Class:
5310
National Item Identification Number:
010864921
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:
| 2W1AL20-20-71 | 43999 | THE BOEING COMPANY |
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Techincal Specification:
| MATERIAL | ALUMINUM ALLOY 2024 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/5,TEMPER T42 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.312 INCHES MINIMUM AND | | 0.322 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 0.609 INCHES MINIMUM AND | | 0.641 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.071 INCHES NOMINAL | | SPECIFICATION/STANDARD DATA | 43999-2W1 MANUFACTURERS STANDARD | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
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