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National Stock Number:
5310-01-488-4995
Federal Supply Class:
5310
National Item Identification Number:
014884995
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:
| 6510E71FN67 | 90099 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | MS51412-9A | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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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 | 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM | | OVERALL DIAMETER | 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTMA331,GRADE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4130 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | SURFACE FINISH | 125.0 MICROINCHES ALL SURFACES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTMB633,TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ZINC AND CHROMATE OVERALL | | THICKNESS | 0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM |
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