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National Stock Number:
5310-01-547-5312
Federal Supply Class:
5310
National Item Identification Number:
015475312
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:
| 98017A660 | 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 | 0.260 INCHES NOMINAL | | OVERALL DIAMETER | 0.500 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | AN 960 ASSN STD ALL MATERIAL RESPONSES OVERALL | | MATERIAL | STEEL OVERALL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | WASHER FLAT | | PERIPHERAL SHAPE STYLE | ROUND | | SPECIAL FEATURES | MILITARY SPECIFICATION STAINLESS STEEL, 18-8 STAINLESS STEEL WASHER MEET MORE STRINGENT SPECIFICATIONS THAN STANDARD STAINLESS STEEL WASHERS. THEY CONFORM TO MS,AN, OR NAS CHEMICAL AND PHYSICAL SPECIFICATIONS. MATERIAL AND DIMENSIONS MEET FF-W-92. WASHERS ARE BURR FREE AND PASSIVATED. ROCKWELL HARDNESS IS B70. AN 960 SCREW SIZE 0.250 IN DASH NUMBER C416. THICKNESS MIN-MAX IS 0.059 IN - 0.067 IN | | SURFACE TREATMENT | CADMIUM OVERALL | | THICKNESS | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
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