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National Stock Number:
3120-00-394-8053
Federal Supply Class:
3120
National Item Identification Number:
003948053
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:
| W121DS-1 | 59180 | CIRCOR PUMPS NORTH AMERICA LLC |
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Techincal Specification:
| BEARING SURFACE HOLE DIAMETER | 0.2480 INCHES MINIMUM FIRST | | BEARING SURFACE HOLE DIAMETER | 0.2500 INCHES MAXIMUM SECOND | | CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 1.8125 INCHES NOMINAL | | OUTSIDE DIAMETER | 3.9980 INCHES MINIMUM AND 3.9990 INCHES MAXIMUM | | OVERALL THICKNESS | 0.8110 INCHES MINIMUM AND 0.8130 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-B-16261 MIL SPEC SINGLE MATERIAL RESPONSE INNER LAYER | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-T-390 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER | | MATERIAL | COPPER ALLOY INNER LAYER | | MATERIAL | TIN ALLOY UNS L13890 OUTER LAYER | | SPECIAL FEATURES | W/2 GROOVES,BEARING SURFACE HOLE 0.2500 IN. DEEP | | STYLE DESIGNATOR | ROUND | | SURFACE CONDITION | GROUND |
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