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National Stock Number:
3120-01-238-0705
Federal Supply Class:
3120
National Item Identification Number:
012380705
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:
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | CHAMFERED FIRST INSIDE CORNER | | CORNER SHAPE | CHAMFERED SECOND INSIDE CORNER | | CORNER SHAPE | SQUARE FIRST OUTSIDE CORNER | | CORNER SHAPE | SQUARE SECOND OUTSIDE CORNER | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 25.50 MILLIMETERS MINIMUM AND 25.71 MILLIMETERS MAXIMUM | | HARDNESS RATING | 56.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL | | OUTSIDE DIAMETER | 37.0 MILLIMETERS MINIMUM AND 37.6 MILLIMETERS MAXIMUM | | OVERALL THICKNESS | 3.12 MILLIMETERS MINIMUM AND 3.20 MILLIMETERS MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 1018 OVERALL | | STYLE DESIGNATOR | ROUND | | SURFACE FINISH | 20.0 MICROINCHES LEFT SIDE | | SURFACE FINISH | 20.0 MICROINCHES RIGHT SIDE |
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