3120-00-839-0297, BEARING,WASHER,THRUST

National Stock Number:
3120-00-839-0297

Federal Supply Class:
3120

National Item Identification Number:
008390297

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.

Manufacturer Information:

44B3021-439B	10855	CARRIER CORP
44B3021-439B	72957	ELLIOTT COMPANY

Techincal Specification:

MATERIAL	STEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING	52.0 ROCKWELL C MINIMUM OVERALL
STYLE DESIGNATOR	ROUND
OUTSIDE DIAMETER	5.1250 INCHES NOMINAL
CORNER SHAPE	SQUARE FIRST OUTSIDE CORNER
	SQUARE SECOND OUTSIDE CORNER
	CHAMFERED FIRST INSIDE CORNER
	CHAMFERED SECOND INSIDE CORNER
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
OVERALL THICKNESS	0.8120 INCHES NOMINAL
CENTER HOLE SHAPE STYLE	ROUND W/KEYWAY
DIAMETER	1.7500 INCHES MINIMUM AND
	1.7510 INCHES MAXIMUM
CENTER HOLE KEYWAY DEPTH	0.1875 INCHES NOMINAL
CENTER HOLE KEYWAY WIDTH	0.3738 INCHES MINIMUM AND
	0.3800 INCHES MAXIMUM
CENTER HOLE KEYWAY QUANTITY	1
SURFACE CONDITION	LAPPED
LUBRICATION MATERIAL	LUBRICANT, MANUFACTURERS STANDARD
SPECIAL FEATURES	FIRST INSIDE CORNER CHAMFER IDENTICAL TO SECOND. THD SURFACE HOLES1/4-20 UNC-3
BEARING SURFACE HOLE QUANTITY	2 FIRST
BEARING SURFACE HOLE DIAMETER	0.2500 INCHES NOMINAL FIRST

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