3120-00-870-6244, BEARING,WASHER,THRUST

National Stock Number:
3120-00-870-6244

Federal Supply Class:
3120

National Item Identification Number:
008706244

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:

10908430	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
3120008706244	SCY13	E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CORNER SHAPE	SQUARE ALL CORNERS
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
DIAMETER	3.9375 INCHES NOMINAL
FEATURES PROVIDED	CASEHARDENED
HARDNESS RATING	89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 92.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
OVERALL THICKNESS	0.1820 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-L-3150 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-T-830 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	OIL LUBRICATING LUBRICATION
MATERIAL	STEEL COMP MT1010 OR STEEL COMP MT1015 OR STEEL COMP MT1020 OR STEEL COMP MTX1015 OR STEEL COMP MTX1020 OVERALL
OUTSIDE DIAMETER	4.6250 INCHES NOMINAL
STYLE DESIGNATOR	ROUND
SURFACE FINISH	125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH	125.0 MICROINCHES LARGEST OUTSIDE DIAMETER
SURFACE FINISH	63.0 MICROINCHES LEFT SIDE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-P-16232 TYPE M CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PHOSPHATE MANGANESE OVERALL

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