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National Stock Number:
5310-01-533-5304
Federal Supply Class:
5310
National Item Identification Number:
015335304
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:
| 98017A690 | 39428 | MCMASTER-CARR SUPPLY CO |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 70.0 ROCKWELL B NOMINAL | | HOLE DIAMETER | 0.225 INCHES MINIMUM AND 0.275 INCHES MAXIMUM | | OVERALL DIAMETER | 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM | | MATERIAL | STEEL AND STEEL COMP 321 AND STEEL COMP 347 AND STEEL COMP 348 OVERALL | | NONDEFINITIVE SPEC/STD DATA | AN960 TYPE | | PERIPHERAL SHAPE STYLE | ROUND | | SPECIAL FEATURES | SCREW SIZE .312 | | SURFACE TREATMENT | PASSIVATE OVERALL | | THICKNESS | 0.200 INCHES MINIMUM AND 0.420 INCHES MAXIMUM |
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