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National Stock Number:
5310-01-197-3340
Federal Supply Class:
5310
National Item Identification Number:
011973340
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:
| T44807 | 61208 | TWIN DISC, INCORPORATED | | TRB-2840 | 60380 | TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT | | UA-2044 | 61208 | TWIN DISC, INCORPORATED | | UA2044 | 61208 | TWIN DISC, INCORPORATED | | TRB-2840 | 63600 | CURTISS-WRIGHT FLOW CONTROL CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | FEATURES PROVIDED | CASEHARDENED | | HARDNESS RATING | 90.0 ROCKWELL SUPERFICIAL 15-N MINIMUM | | HOLE DIAMETER | 1.752 INCHES MINIMUM AND 1.762 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD ALL MATERIAL RESPONSES OVERALL | | MATERIAL | STEEL COMP 1010 OVERALL OR STEEL COMP 1011 OVERALL OR STEEL COMP 1012 OVERALL OR STEEL COMP 1013 OVERALL OR STEEL COMP 1015 OVERALL OR STEEL COMP 1016 OVERALL OR STEEL COMP 1020 OVERALL | | PERIPHERAL SHAPE STYLE | ROUND | | PROPRIETARY CHARACTERISTICS | PACS | | OVERALL DIAMETER | 2.470 INCHES MINIMUM AND 2.490 INCHES MAXIMUM | | SURFACE FINISH | 35.0 MICROINCHES TOP | | SURFACE FINISH | 35.0 MICROINCHES BOTTOM | | THICKNESS | 0.061 INCHES MINIMUM AND 0.064 INCHES MAXIMUM |
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