MR56

View detailed technical data, stock status, and sourcing information for: MR56
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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-00-172-7091

Item Name Code

00051

Assigment Date

11/26/1971 (54 years ago)

3.5000 inches nominal bore diameter, 4.5000 inches nominal overall outside diameter, 2.0000 inches nominal overall width, pressed retainer fabrication method, ground surface finish

Product Characteristics

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

Overall Width: 2.0000 inches nominal
Bore Diameter: 3.5000 inches nominal
Overall Outside Diameter: 4.5000 inches nominal
Surface Finish: ground
Retainer Fabrication Method: pressed
Alignment Type: rigid
Standard Tolerance Designation: afbma std tolerance for industrial needle bearings
Material: steel comp e52100 overall
Material Document And Classification: 66 fed std single material response overall
Special Test Features: special quality control testing
Style Designator: non-separable, with roller retainer, hardened and ground
Test Data Document: "81349-mil-p-231999 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Reference Number Differentiating Characteristics: material must conform to ships parts control center special quality control provisions

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
MR56	Needle Roller Bearing

FAQs

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

What is the FSCG of the NSN 3110-00-172-7091?

The FSCG of the NSN 3110-00-172-7091 is 3110

Does the NSN 3110-00-172-7091 have a Schedule B code assigned?

Yes, the Schedule B code is 8482400000

Does NSN 3110-00-172-7091 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 3110-00-172-7091 contain precious materials?

Item does not contain precious metal.

Does NSN 3110-00-172-7091 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 3110-00-172-7091 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Fri, Nov 26, 1971