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National Stock Number:
5310-01-288-3801
Federal Supply Class:
5310
National Item Identification Number:
012883801
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:
| 13294656-6 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| MATERIAL | STEEL COMP 303SE OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582,CONDITION A ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OR | | OXIDE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND | | MIL-C-13924 MIL SPEC 2ND TREATMENT RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.440 INCHES MINIMUM AND | | 0.460 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 0.850 INCHES MINIMUM AND | | 0.870 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.048 INCHES MINIMUM AND | | 0.052 INCHES MAXIMUM |
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