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National Stock Number:
5310-01-566-9850
Federal Supply Class:
5310
National Item Identification Number:
015669850
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:
| 10910174 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 12387327 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 12387327-28 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 12387327-28 | 80212 | BAE SYSTEMS LAND & ARMAMENTS L.P. |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM | | HOLE DIAMETER | 0.521 INCHES MINIMUM AND 0.541 INCHES MAXIMUM | | OVERALL DIAMETER | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | A829 ASSN STD 1ST MATERIAL RESPONSE OR A322 ASSN STD 1ST MATERIAL RESPONSE OR A331 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6350 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6351 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6345 ASSN STD 1ST MATERIAL RESPONSE OR A829 ASSN STD 2ND MATERIAL RESPONSE OR A322 ASSN STD 2ND MATERIAL RESPONSE OR A331 ASSN STD 2ND MATERIAL RESPONSE OR A829 ASSN STD 3RD MATERIAL RESPONSE OR A322 ASSN STD 3RD MATERIAL RESPONSE OR A331 ASSN STD 3RD MATERIAL RESPONSE OR A322 ASSN STD 4TH MATERIAL RESPONSE OR A331 ASSN STD 4TH MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171, 1.9.2.2 MIL STD SINGLE TREATMENT RESPONSE AND ASTM B633, TY II, CL 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ZINC OVERALL | | THICKNESS | 0.202 INCHES MINIMUM AND 0.216 INCHES MAXIMUM |
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