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National Stock Number:
5310-01-124-8229
Federal Supply Class:
5310
National Item Identification Number:
011248229
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:
| 64361-04009-101 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM | | HOLE DIAMETER | 0.3750 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000,COND C MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6758,COND C MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6758,COND D MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | MATERIAL | STEEL COMP E4340 OR STEEL COMP 4130 OVERALL | | MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH | | OVERALL DIAMETER | 0.750 INCHES NOMINAL | | SPECIAL FEATURES | FLAT AREA OF WASHER TO BE TANGENT TO 0.500 IN. RADIUS BOTH SIDES | | SURFACE FINISH | 90.0 MICROINCHES ALL SURFACES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-P-416,TY 3,CL 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | | | THICKNESS | 0.093 INCHES MINIMUM AND 0.096 INCHES MAXIMUM |
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