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National Stock Number:
5310-01-081-5062
Federal Supply Class:
5310
National Item Identification Number:
010815062
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:
| ST4M203-6 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | COLOR | BLUE OVERALL | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM | | HOLE DIAMETER | 0.390 INCHES NOMINAL | | OVERALL DIAMETER | 0.625 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-S-18733 MIL SPEC 2ND MATERIAL RESPONSE AND MIL-S-18728 MIL SPEC 3RD MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4130 OR STEEL COMP 4135 OR STEEL COMP 8630 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-8837 TYPE II CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THICKNESS | 0.032 INCHES NOMINAL |
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