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National Stock Number:
5310-01-176-4000
Federal Supply Class:
5310
National Item Identification Number:
011764000
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:
| 13214E2106 | 97403 | CECOM LR CENTER |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | FEATURES PROVIDED | CASEHARDENED | | HARDNESS RATING | 73.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 79.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM | | HOLE DIAMETER | 2.375 INCHES NOMINAL | | OVERALL DIAMETER | 4.190 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A366 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A569 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A109 ASSN STD 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 1009 OR STEEL COMP 1137 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE FINISH | 32.0 MICROINCHES BOTTOM | | SURFACE FINISH | 32.0 MICROINCHES TOP | | THICKNESS | 0.111 INCHES MINIMUM AND 0.115 INCHES MAXIMUM |
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