3120-00-662-6721, BEARING,WASHER,THRUST

National Stock Number:
3120-00-662-6721

Federal Supply Class:
3120

National Item Identification Number:
006626721

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:

4015034	71379	CESSNA AIRCRAFT COMPANY
4015034	7EK50	TEXTRON AVIATION INC

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CORNER SHAPE	SQUARE FIRST INSIDE CORNER
CORNER SHAPE	SQUARE FIRST OUTSIDE CORNER
CORNER SHAPE	SQUARE FOURTH OUTSIDE CORNER
CORNER SHAPE	SQUARE SECOND INSIDE CORNER
CORNER SHAPE	SQUARE SECOND OUTSIDE CORNER
CORNER SHAPE	SQUARE THIRD OUTSIDE CORNER
CROSS-SECTIONAL SHAPE STYLE	SHOULDERED
DIAMETER	0.6260 INCHES MINIMUM AND 0.6280 INCHES MAXIMUM
FLANGE THICKNESS	0.0620 INCHES NOMINAL
OUTSIDE DIAMETER	0.8750 INCHES NOMINAL
OVERALL THICKNESS	0.1770 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-B-5687,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-L-7870 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
MATERIAL	COPPER ALLOY OVERALL
MATERIAL	OIL LUBRICATING LUBRICATION
SHANK OUTSIDE DIAMETER	0.7512 INCHES MINIMUM AND 0.7522 INCHES MAXIMUM
STYLE DESIGNATOR	ROUND
SURFACE CONDITION	GROUND

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