H4-020

View detailed technical data, stock status, and sourcing information for: H4-020
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-01-042-8908

Item Name Code

13206

Assigment Date

06/17/1977 (49 years ago)

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.

0.1950 inches minimum and 0.2000 inches maximum overall length, 0.3115 inches minimum and 0.3120 inches maximum body outside diameter, 125.0 microinches inner member surface finish, 0.2500 inches minimum and 0.2515 inches maximum body inside diameter, square all corners corner shape

Product Characteristics

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

Overall Length: 0.1950 inches minimum and 0.2000 inches maximum
Body Outside Diameter: 0.3115 inches minimum and 0.3120 inches maximum
Body Inside Diameter: 0.2500 inches minimum and 0.2515 inches maximum
Corner Shape: square all corners
Surface Finish: 125.0 microinches inner member
Surface Finish: 125.0 microinches left end surface of body
Surface Finish: 125.0 microinches right end surface of body
Surface Finish: 8.0 microinches outside diameter surface of body
Material: steel comp 630 or steel comp 321 overall
Surface Treatment: chromium outside diameter surface of body
Surface Treatment Document And Classification: qq-c-320 fed spec single treatment response outside diameter surface of body
Style Designator: solid, plain, no outside flanges

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
B365-4-020	Sleeve Bushing
GL519A4-020	Sleeve Bushing
H4-020	Sleeve Bushing
SJ6H8-020	Sleeve Bushing

FAQs

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

What is the FSCG of the NSN 3120-01-042-8908?

The FSCG of the NSN 3120-01-042-8908 is 3120

Does the NSN 3120-01-042-8908 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-01-042-8908 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 3120-01-042-8908 contain precious materials?

Precious metal content is unknown

Does NSN 3120-01-042-8908 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 3120-01-042-8908 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Fri, Jun 17, 1977