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National Stock Number:
5310-01-031-8370
Federal Supply Class:
5310
National Item Identification Number:
010318370
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:
| 2508735 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | COLOR | BLACK OVERALL | | CRITICALITY CODE JUSTIFICATION | ZZZW | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DEPARTURE FROM CITED DOCUMENT | AS DIFFERENTIATED BY SPECIAL QUALITY CONTROL TESTING FOR MK 48 TORPEDO | | HARDNESS RATING | 27.0 ROCKWELL C MINIMUM OR 35.0 ROCKWELL C MAXIMUM | | HOLE DIAMETER | 0.564 INCHES MINIMUM AND 0.568 INCHES MAXIMUM | | INSIDE RIGHT CORNER CHAMFER ANGLE | 45.0 DEGREES NOMINAL | | INSIDE LEFT CORNER CHAMFER ANGLE | 45.0 DEGREES NOMINAL | | OUTSIDE RIGHT CORNER CHAMFER ANGLE | 45.0 DEGREES NOMINAL | | OUTSIDE LEFT CORNER CHAMFER ANGLE | 45.0 DEGREES NOMINAL | | OVERALL DIAMETER | 1.375 INCHES NOMINAL | | MATERIAL | STEEL COMP 4140 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT | OXIDE FILM OVERALL | | THICKNESS | 0.187 INCHES NOMINAL |
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