4-202

View detailed technical data, stock status, and sourcing information for: 4-202
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-01-227-6490

Item Name Code

13206

Assigment Date

03/06/1986 (40 years ago)

A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes:items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).

grooved open both ends lubricant accommodation style, 0.4340 inches minimum and 0.4350 inches maximum body outside diameter, 0.2497 inches minimum and 0.2507 inches maximum body inside diameter, 2.1220 inches minimum and 2.1280 inches maximum overall length, round outside left corner 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: 2.1220 inches minimum and 2.1280 inches maximum
Body Outside Diameter: 0.4340 inches minimum and 0.4350 inches maximum
Body Inside Diameter: 0.2497 inches minimum and 0.2507 inches maximum
Lubricant Accommodation Style: grooved open both ends
Corner Shape: round outside left corner
Corner Shape: square inside left corner
Corner Shape: square inside right corner
Corner Shape: square outside right corner
Hardness Rating: 27.0 rockwell c minimum and 33.0 rockwell c maximum overall
Surface Finish: 63.0 microinches outside diameter surface of body
Surface Groove Location And Quantity: 1 internal
Material: steel comp 4130 or steel comp 4140 or steel comp e4340 overall
Material Document And Classification: mil-s-6758 mil spec 1st material response or mil-s-5626 mil spec 2nd material response or mil-s-5000 mil spec 3rd material response overall
Surface Treatment: chromium outside diameter surface of body
Surface Treatment Document And Classification: qq-c-320,class 2 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
4-202	Sleeve Bushing
GB10D4-202	Sleeve Bushing

FAQs

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

What is the FSCG of the NSN 3120-01-227-6490?

The FSCG of the NSN 3120-01-227-6490 is 3120

Does the NSN 3120-01-227-6490 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-01-227-6490 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 3120-01-227-6490 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-01-227-6490 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 3120-01-227-6490 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Thu, Mar 6, 1986