3120-01-152-2612, BEARING,WASHER,THRUST

National Stock Number:
3120-01-152-2612

Federal Supply Class:
3120

National Item Identification Number:
011522612

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:

14022644	11862	GENERAL MOTORS CORP CHEVROLET MOTOR DIV SPECIAL PRODUCTS DEPT
14022644	7X677	GENERAL MOTORS LLC
3120PL0875287	9009H	INSPEKTORAT WSPARCIA SIL ZBROJNYCH

Techincal Specification:

MATERIAL	IRON CAST OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	231-M,FSCM 24617 MFR REF SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING	83.0 ROCKWELL B MINIMUM AND
	102.0 ROCKWELL B MAXIMUM OVERALL
SURFACE TREATMENT	PHOSPHATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	4277M,FSCM 24617 MFR REF SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATOR	ROUND W/ROUND KEYS
KEY LENGTH	14.0 MILLIMETERS NOMINAL
OUTSIDE DIAMETER	74.0 MILLIMETERS NOMINAL
KEY RADIUS	10.0 MILLIMETERS NOMINAL
KEY QUANTITY	2
CORNER SHAPE	SQUARE ALL CORNERS
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
OVERALL THICKNESS	4.02 MILLIMETERS MINIMUM AND
	4.10 MILLIMETERS MAXIMUM
CENTER HOLE SHAPE STYLE	ROUND
DIAMETER	44.62 MILLIMETERS MINIMUM AND
	45.38 MILLIMETERS MAXIMUM
SURFACE FINISH	125.0 MICROINCHES LEFT SIDE
	125.0 MICROINCHES RIGHT SIDE
BEARING SURFACE HOLE QUANTITY	2 FIRST
	2 SECOND
BEARING SURFACE HOLE DIAMETER	8.50 MILLIMETERS MINIMUM AND
	8.85 MILLIMETERS MAXIMUM FIRST
	5.0 MILLIMETERS NOMINAL SECOND
BOLT CIRCLE DIAMETER	82.0 MILLIMETERS NOMINAL FIRST
	55.0 MILLIMETERS NOMINAL SECOND

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