ST4M139P4-30

View detailed technical data, stock status, and sourcing information for: ST4M139P4-30
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-01-129-7658

Item Name Code

13206

Assigment Date

04/10/1982 (44 years ago)

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.

0.2435 inches minimum and 0.2450 inches maximum body inside diameter, 0.3550 inches minimum and 0.3670 inches maximum overall length, 0.3766 inches minimum and 0.3771 inches maximum body outside diameter, 0.0600 inches minimum and 0.0620 inches maximum flange width, 0.4900 inches minimum and 0.5100 inches maximum flange outside diameter

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Overall Length: 0.3550 inches minimum and 0.3670 inches maximum
Body Outside Diameter: 0.3766 inches minimum and 0.3771 inches maximum
Body Inside Diameter: 0.2435 inches minimum and 0.2450 inches maximum
Flange Outside Diameter: 0.4900 inches minimum and 0.5100 inches maximum
Flange Width: 0.0600 inches minimum and 0.0620 inches maximum
Corner Shape: square left flange outside right corner
Corner Shape: square outside left corner
Corner Shape: square inside left corner
Corner Shape: square inside right corner
Corner Shape: square outside right corner
Corner Shape: undercut left flange body corner
Material: copper alloy 630 overall
Material Document And Classification: ams 4640 assn std single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,type 2,class 3 fed spec single treatment response overall
Style Designator: solid, external flange one end
Specification/Standard Data: 76301-4-139 manufacturers standard

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
10107864	Sleeve Bushing
4M139P4-30	Sleeve Bushing
ST4M139P4-30	Sleeve Bushing

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 3120-01-129-7658?

The FSCG of the NSN 3120-01-129-7658 is 3120

Does the NSN 3120-01-129-7658 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-01-129-7658 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 3120-01-129-7658 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-01-129-7658 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 3120-01-129-7658 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Sat, Apr 10, 1982