4M139 Sleeve Bushing

Comprehensive specifications and application details for: 4M139 Sleeve Bushing.

Summary

Explore detailed summary information for bearing: 4M139. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: 4M139
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-01-257-4388
Item Name Code: 13206
Federal Item Identification Guide: A045A0
Assigment Date: 06/19/1987

A tubular shaped unthreaded item with or without a flange at one end designed to be inserted into a hole to reduce the inside diameter of the hole and to protect the surrounding body structure from damage resulting from stress, strain, and/or vibration. The overall length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body. Includes items which are divided into two or more segments which includes 180 degrees (3.141 radians) or less of the bearing periphery. For items made of rubber, see bushing, nonmetallic. See also bearing, sleeve; bushing, tapered; spacer, sleeve; insulator, bushing; and bushing, electrical conductor. Excludes:bushing, drill, jig.

square inside left corner corner shape, square outside left corner corner shape, 0.2435 inches minimum and 0.2450 inches maximum body inside diameter, square left flange outside right corner corner shape, 0.3766 inches minimum and 0.3771 inches maximum body outside diameter

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-01-257-4388 . Find dimensions, materials, tolerances, performance characteristics, etc.

Body Inside Diameter: 0.2435 inches minimum and 0.2450 inches maximum
Body Outside Diameter: 0.3766 inches minimum and 0.3771 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
Flange Outside Diameter: 0.4900 inches minimum and 0.5100 inches maximum
Flange Width: 0.0600 inches minimum and 0.0620 inches maximum
Overall Length: 0.1820 inches nominal
Material Document And Classification: qq-c-530,cond h t fed spec single material response overall
Material: copper alloy 172 and copper alloy 173 overall
Style Designator: solid, external flange one end
Surface Treatment Document And Classification: qq-p-416,type 2,class 2 fed spec single treatment response overall
Surface Treatment: cadmium and chromate overall

Frequently Asked Questions

Find quick answers to common questions about bearing: 4M139. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-01-257-4388?: The FSCG of the NSN 3120-01-257-4388 is 3120

Does the NSN 3120-01-257-4388 have a Schedule B code assigned?: Yes, the Schedule B code is 8482997060

Does NSN 3120-01-257-4388 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 3120-01-257-4388 contain precious materials?: Item does not contain precious metal.

Does NSN 3120-01-257-4388 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.