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National Stock Number:
5310-00-185-0158
Federal Supply Class:
5310
National Item Identification Number:
001850158
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:
| 306-005-0010 | 79570 | WHITEHEAD MFG CO | | 306-005-0010 | 80752 | PUTNAM ROLLING LADDER CO INC | | 306-005-0010 | 95542 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 6864750 | 73342 | ALLISON TRANSMISSION INC | | EU12003 | 73342 | ALLISON TRANSMISSION INC |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HOLE DIAMETER | 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM | | OVERALL DIAMETER | 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT | PASSIVATE OVERALL | | THICKNESS | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM |
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