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National Stock Number:
5310-01-507-2223
Federal Supply Class:
5310
National Item Identification Number:
015072223
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:
| 221822 008000 | 64678 | DAIMLER TRUCK NORTH AMERICA LLC | | B18.22M | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED |
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Techincal Specification:
| MATERIAL | STEEL OVERALL | | SURFACE TREATMENT | CHROMATE ZINC OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | 49-00005-403 MFR REF ALL TREATMENT RESPONSES OR | | 49-00005-203 MFR REF ALL TREATMENT RESPONSES OVERALL | | CENTER HOLE SHAPE STYLE | ROUND | | HOLE DIAMETER | 8.9 MILLIMETERS MINIMUM AND | | 9.1 MILLIMETERS MAXIMUM | | PERIPHERAL SHAPE STYLE | ROUND | | OVERALL DIAMETER | 18.4 MILLIMETERS MINIMUM AND | | 18.8 MILLIMETERS MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | THICKNESS | 1.6 MILLIMETERS MINIMUM AND | | 2.3 MILLIMETERS MAXIMUM | | HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND | | 45.0 ROCKWELL C MAXIMUM | | SPECIAL FEATURES | MUST BE SUITABLY TREATED FOR RELIEF OF HYDROGEN EMBRITTLEMENT; CONFORMS IN ALL ESSENTIALS WITH ANSI B18.22M (NARROW SERIES) METRIC PLAIN WASHERS | | SUPPLEMENTARY FEATURES | CAGE CALLS THIS: WASHER-FLAT,METRIC,HARDENED |
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