21-025-56

View detailed technical data, stock status, and sourcing information for: 21-025-56
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-01-066-1974

Item Name Code

13206

Assigment Date

10/04/1978 (47 years ago)

A detachable assembly in or on which a journal, gudgeon, pivot, or the like moves. It is used to carry a load and to reduce sliding friction. It does not employ rolling elements. The item consists of a bored precision ground ball (or spherical plain bearing) around which an outer ring is fitted. The assembly may be either separable or nonseparable. Excludes:bearing, plain, rod end and bearing, plain, spherical.

chamfered inside left corner corner shape, 0.8720 inches minimum and 0.8780 inches maximum overall length, chamfered inside right corner corner shape, 0.2497 inches minimum and 0.2502 inches maximum body inside diameter, 0.3740 inches minimum and 0.3745 inches maximum body 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: 0.8720 inches minimum and 0.8780 inches maximum
Body Outside Diameter: 0.3740 inches minimum and 0.3745 inches maximum
Body Inside Diameter: 0.2497 inches minimum and 0.2502 inches maximum
Corner Shape: chamfered inside left corner
Corner Shape: chamfered inside right corner
Corner Shape: square outside left corner
Corner Shape: square outside right corner
Material: steel comp 8740 or steel comp 8630 or steel comp 4130 overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 2 fed spec single treatment response overall
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
21-025-56	Sleeve Bushing

FAQs

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

What is the FSCG of the NSN 3120-01-066-1974?

The FSCG of the NSN 3120-01-066-1974 is 3120

Does the NSN 3120-01-066-1974 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-01-066-1974 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 3120-01-066-1974 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-01-066-1974 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 3120-01-066-1974 was assigned to the Federal Catalog?

It was assigned 47 years ago, on Wed, Oct 4, 1978