3120-01-327-7998, BEARING,WASHER,THRUST

National Stock Number:
3120-01-327-7998

Federal Supply Class:
3120

National Item Identification Number:
013277998

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:

5819949

53711

NAVAL SEA SYSTEMS COMMAND

Techincal Specification:

CENTER HOLE SHAPE STYLE	ROUND
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
DIAMETER	0.5020 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM
HARDNESS RATING	31.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL
OUTSIDE DIAMETER	0.6800 INCHES MINIMUM AND 0.6806 INCHES MAXIMUM
OVERALL THICKNESS	0.0615 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5604 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL CORROSION RESISTING OVERALL
STYLE DESIGNATOR	ROUND
SURFACE FINISH	125.0 MICROINCHES LARGEST OUTSIDE DIAMETER
SURFACE FINISH	125.0 MICROINCHES LEFT SIDE
SURFACE FINISH	125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH	125.0 MICROINCHES RIGHT SIDE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL

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