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National Stock Number:
5310-01-531-4880
Federal Supply Class:
5310
National Item Identification Number:
015314880
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:
| 88-20033-51A | 30554 | DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM | | OVERALL DIAMETER | 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A 108 ASSN STD ALL MATERIAL RESPONSES OR ASTM A 109 ASSN STD ALL MATERIAL RESPONSES OVERALL | | MATERIAL | STEEL OVERALL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | WASHER,FLAT | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE FINISH | 0.0 MICROINCHES ALL SURFACES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B 633, SC 3, TYPE II ASSN STD ALL TREATMENT RESPONSES OVERALL | | SURFACE TREATMENT | ZINC OVERALL | | THICKNESS | 0.108 INCHES MINIMUM AND 0.160 INCHES MAXIMUM |
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