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National Stock Number:
5310-01-564-3114
Federal Supply Class:
5310
National Item Identification Number:
015643114
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:
| 12759-00758 | 0Y3H3 | FASTENAL COMPANY | | 33860 | 0Y3H3 | FASTENAL COMPANY |
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Techincal Specification:
| MATERIAL | NICKEL ALLOY 400 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ZINC OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633, SC1. TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.495 INCHES MINIMUM AND | | 0.515 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 1.243 INCHES MINIMUM AND | | 1.280 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | BLANK RECTANGULAR | | THICKNESS | 0.019 INCHES MINIMUM AND | | 0.187 INCHES MAXIMUM | | SPECIAL FEATURES | CORE HARDNESS: HRC 38 TO 45; DIMENSIONS: ASME B18.22.1, TYPE A, USS PLAIN WASHERS | | PART NAME ASSIGNED BY CONTROLLING AGENCY | 7/16 INCH, FLAT WASHERS, THRU-HARDENED HIGH STRENGTH, USS, YELLOW ZINC PLATED |
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