3120-00-953-1591, BEARING,WASHER,THRUST

National Stock Number:
3120-00-953-1591

Federal Supply Class:
3120

National Item Identification Number:
009531591

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:

65356-04052-101

78286

SIKORSKY AIRCRAFT CORPORATION

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	2.0730 INCHES MINIMUM AND 2.0740 INCHES MAXIMUM
FLANGE THICKNESS	0.0610 INCHES MINIMUM AND 0.0630 INCHES MAXIMUM
OUTSIDE DIAMETER	2.4600 INCHES NOMINAL
OVERALL THICKNESS	0.1470 INCHES MINIMUM AND 0.1490 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-B-5687 MIL SPEC ALL MATERIAL RESPONSES OVERALL
MATERIAL	COPPER ALLOY OR IRON COMP B OR IRON COMP A1 OR IRON COMP A2 OR IRON COMP A3 OVERALL
MATERIAL	OIL LUBRICATING LUBRICATION
SHANK OUTSIDE DIAMETER	2.1990 INCHES MINIMUM AND 2.2010 INCHES MAXIMUM
STYLE DESIGNATOR	ROUND
SURFACE FINISH	90.0 MICROINCHES LARGEST OUTSIDE DIAMETER
SURFACE FINISH	90.0 MICROINCHES LEFT SIDE
SURFACE FINISH	90.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH	90.0 MICROINCHES RIGHT SIDE
SURFACE FINISH	90.0 MICROINCHES RIGHT SIDE OF FLANGE
SURFACE FINISH	90.0 MICROINCHES SMALLEST OUTSIDE DIAMETER

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