4M98-4-1-20

View detailed technical data, stock status, and sourcing information for: 4M98-4-1-20
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-079-1783

Item Name Code

13206

Assigment Date

12/08/1967 (58 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.

0.0300 inches minimum and 0.0350 inches maximum flange width, 0.2540 inches minimum and 0.2570 inches maximum body inside diameter, 0.3131 inches minimum and 0.3136 inches maximum body outside diameter, 0.3600 inches minimum and 0.3800 inches maximum flange outside diameter, 0.2250 inches minimum and 0.2400 inches maximum overall length

Product Characteristics

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

Overall Length: 0.2250 inches minimum and 0.2400 inches maximum
Body Outside Diameter: 0.3131 inches minimum and 0.3136 inches maximum
Body Inside Diameter: 0.2540 inches minimum and 0.2570 inches maximum
Flange Outside Diameter: 0.3600 inches minimum and 0.3800 inches maximum
Flange Width: 0.0300 inches minimum and 0.0350 inches maximum
Corner Shape: square left flange body corner
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
Surface Finish: 125.0 microinches intermediate layer
Material: steel overall
Surface Treatment: cadmium and chromium overall
Style Designator: solid, external flange one end

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
4M98-4-1-20	Sleeve Bushing

FAQs

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

What is the FSCG of the NSN 3120-00-079-1783?

The FSCG of the NSN 3120-00-079-1783 is 3120

Does the NSN 3120-00-079-1783 have a Schedule B code assigned?

Yes, the Schedule B code is 8482997060

Does NSN 3120-00-079-1783 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 3120-00-079-1783 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-00-079-1783 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 3120-00-079-1783 was assigned to the Federal Catalog?

It was assigned 58 years ago, on Fri, Dec 8, 1967