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National Stock Number:
5310-01-040-0428
Federal Supply Class:
5310
National Item Identification Number:
010400428
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:
| 2505604-7 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER | | 2505604-7 | 53711 | NAVAL SEA SYSTEMS COMMAND |
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Techincal Specification:
| MATERIAL | STEEL COMP 4130 OR | | STEEL COMP 4140H OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AISI4130 ASSN STD 1ST MATERIAL RESPONSE OR | | AISI4140H ASSN STD 2ND MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYP 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.315 INCHES MINIMUM AND | | 0.321 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 0.472 INCHES MINIMUM AND | | 0.478 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.057 INCHES MINIMUM AND | | 0.067 INCHES MAXIMUM | | HARDNESS RATING | 27.0 ROCKWELL C MINIMUM AND | | 35.0 ROCKWELL C MAXIMUM | | DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY SPECIAL QUALITY CONTROL TESTING FOR MK 48 TORPEDO | | CRITICALITY CODE JUSTIFICATION | ZZZW |
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