3120-00-404-3688

Find complete technical information, availability, and procurement data for: 3120-00-404-3688
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-404-3688

Item Name Code

13211

Assigment Date

01/13/1972 (54 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.

rectangular cross-sectional shape style, 3.3800 inches nominal diameter, round center hole shape style, 4.2500 inches nominal outside diameter, 0.1880 inches nominal overall thickness

Product Characteristics

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

Cross-Sectional Shape Style: rectangular
Outside Diameter: 4.2500 inches nominal
Center Hole Shape Style: round
Diameter: 3.3800 inches nominal
Overall Thickness: 0.1880 inches nominal
Bearing Surface Hole Quantity: 2 first
Bearing Surface Hole Diameter: 0.1802 inches nominal first
Corner Shape: square all corners
Surface Finish: 32.0 microinches overall
Lubrication Feature: groove external surface member
Material: copper alloy overall
Style Designator: round

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
31-9S6741	Thrust Washer Bearing
9S6741	Thrust Washer Bearing

FAQs

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

What is the FSCG of the NSN 3120-00-404-3688?

The FSCG of the NSN 3120-00-404-3688 is 3120

Does the NSN 3120-00-404-3688 have a Schedule B code assigned?

Yes, the Schedule B code is 8482105008

Does NSN 3120-00-404-3688 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 3120-00-404-3688 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-00-404-3688 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 3120-00-404-3688 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Thu, Jan 13, 1972