2057-1211-102

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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-01-237-5310

Item Name Code

13211

Assigment Date

07/31/1986 (39 years ago)

An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes:straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.

0.3900 inches nominal diameter, round center hole shape style, rectangular cross-sectional shape style, 0.0095 inches minimum and 0.0105 inches maximum overall thickness, 0.6250 inches nominal outside diameter

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: 0.6250 inches nominal
Center Hole Shape Style: round
Diameter: 0.3900 inches nominal
Overall Thickness: 0.0095 inches minimum and 0.0105 inches maximum
Corner Shape: square all corners
Surface Finish: 63.0 microinches left side
Surface Finish: 63.0 microinches right side
Material: copper alloy 841 overall
Material: oil lubricating lubrication
Material Document And Classification: mil-b-5657,type 1,grade 1 mil spec single material response 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
2057-1211-102	Thrust Washer Bearing

FAQs

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

What is the FSCG of the NSN 3120-01-237-5310?

The FSCG of the NSN 3120-01-237-5310 is 3120

Does the NSN 3120-01-237-5310 have a Schedule B code assigned?

Yes, the Schedule B code is 8482105008

Does NSN 3120-01-237-5310 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 3120-01-237-5310 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-01-237-5310 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 3120-01-237-5310 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Thu, Jul 31, 1986