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National Stock Number:
3120-00-168-9765
Federal Supply Class:
3120
National Item Identification Number:
001689765
Description:
BEARING,WASHER,THRUST
Detail:
An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also WASHER, FLAT and SPACER, SLEEVE.
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Manufacturer Information:
| 7979481 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 0.5250 INCHES MINIMUM AND 0.5300 INCHES MAXIMUM | | FEATURES PROVIDED | CASEHARDENED | | HARDNESS RATING | 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL | | OUTSIDE DIAMETER | 1.5000 INCHES NOMINAL | | OVERALL THICKNESS | 0.1840 INCHES MINIMUM AND 0.1850 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTMA682 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-13281 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1074 OR STEEL OVERALL | | SPECIAL FEATURES | LEFT SIDE COUNTERSUNK0.55 IN. MIN 0.58 IN. MAX DIA BY 90 DEG | | STYLE DESIGNATOR | ROUND W/TWO FLATS | | SURFACE FINISH | 32.0 MICROINCHES LEFT SIDE | | SURFACE FINISH | 32.0 MICROINCHES RIGHT SIDE |
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