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National Stock Number:
5310-01-552-1068
Federal Supply Class:
5310
National Item Identification Number:
015521068
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:
| MS21307-5 | 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 | | HOLE DIAMETER | 0.797 INCHES MINIMUM AND 0.876 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | SQUARE | | SPECIAL FEATURES | END ITEM: OE-371(V)/G ANTENNA GROUP, ITEM MATERIAL IS STEEL CARBON GRADES 1010 THRU 1015 IN ACCORDANCE WITH ASTM A109 AND HAS A ZINC GALVANIZED COATING PER ASTM A153 CLASS C | | WIDTH ACROSS FLATS | 2.875 INCHES MINIMUM AND 3.125 INCHES MAXIMUM | | THICKNESS | 0.234 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
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