39-21057-1

View detailed technical data, stock status, and sourcing information for: 39-21057-1
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-777-2305

Item Name Code

13208

Assigment Date

01/01/1960 (66 years ago)

2.2492 inches minimum and 2.2497 inches maximum bore diameter, 1.6870 inches minimum and 1.6970 inches maximum outer member width, groove internal surfaces lubrication feature, 1.9640 inches minimum and 1.9690 inches maximum inner member width, 3.5617 inches minimum and 3.5625 inches maximum outer member outside diameter

Product Characteristics

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

Bore Diameter: 2.2492 inches minimum and 2.2497 inches maximum
Outer Member Outside Diameter: 3.5617 inches minimum and 3.5625 inches maximum
Outer Member Width: 1.6870 inches minimum and 1.6970 inches maximum
Inner Member Width: 1.9640 inches minimum and 1.9690 inches maximum
Lubrication Feature: groove internal surfaces
Material: oil lubricating lubrication
Material: steel comp e4340 outer race member
Material: steel comp e52100 inner member
Material Document And Classification: fed std 66 fed std single material response and aisi/sae e52100 assn std single material response inner member
Material Document And Classification: mil-s-5000 mil spec single material response outer race member
Precious Material: silver
Surface Treatment: silver outer race member
Surface Treatment: chromium inner member
Style Designator: without insert or liner

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
39-21057-1	Self-Aligning Plain Bearing

FAQs

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

What is the FSCG of the NSN 3120-00-777-2305?

The FSCG of the NSN 3120-00-777-2305 is 3120

Does the NSN 3120-00-777-2305 have a Schedule B code assigned?

Yes, the Schedule B code is 8482300040

Does NSN 3120-00-777-2305 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 3120-00-777-2305 contain precious materials?

Item contains silver.

Does NSN 3120-00-777-2305 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 3120-00-777-2305 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960