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National Stock Number:
5310-00-187-4083
Federal Supply Class:
5310
National Item Identification Number:
001874083
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:
| FF-W-92B TY B GR I CL A | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | | FFW92TYPEBGRADE1CLASSA | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| MATERIAL | IRON AND | | STEEL OVERALL | | SURFACE TREATMENT | ZINC OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325 TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 0.552 INCHES MINIMUM AND | | 0.572 INCHES MAXIMUM | | PERIPHERAL SHAPE STYLE | SQUARE | | WIDTH ACROSS FLATS | 2.000 INCHES NOMINAL | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 0.1875 INCHES NOMINAL | | NONDEFINITIVE SPEC/STD DATA | B TYPE AND | | 1 GRADE AND | | A CLASS | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 81348 | | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FF-W-92B TY B GR I CL A |
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