MR4AB

View detailed technical data, stock status, and sourcing information for: MR4AB
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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-00-684-1840

Item Name Code

00050

Assigment Date

01/01/1963 (63 years ago)

A special single or multiple-row roller bearing, rigid or self-aligning, and constructed with either inside threaded, plain hollow, maile threaded, or solid shank.

externally threaded shank style, right-hand thread direction, 3.4099 inches nominal overall length, 3a thread class, 0.3750 inches nominal shank diameter

Product Characteristics

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

Thread Class: 3a
Thread Direction: right-hand
Shank Diameter: 0.3750 inches nominal
Shank Style: externally threaded
Overall Length: 3.4099 inches nominal
Bore Diameter: 0.2500 inches nominal
Overall Outside Diameter: 1.0800 inches nominal
Shank Thread Length: 2.0000 inches nominal
Outer Ring Width: 0.3600 inches nominal
Inner Ring Width: 0.5000 inches nominal
Length From Bore Center To Shank End: 2.7500 inches nominal
Seal Quantity: 2
Bearing Seal Type: contact
Alignment Type: self-aligning
Self-Alignment Location: internal
Thread Quantity Per Inch: 24
Nominal Thread Size: 0.375 inches
Self-Alignment Angle: 10.00 degrees nominal
Special Features: reduced clearance,with grease fitting,keyway in shank 0.0640 in. by 0.2000 in
Lubrication Material: grease
Lubrication Material Document And Classification: mil-g-23827 mil spec single material response
Material: rubber synthetic seal
Material: steel inner ring
Material: steel outer ring
Material: steel roller
Material: steel shaft
Surface Treatment: cadmium all external/exposed metal surfaces
Style Designator: single row, concave rollers
Thread Series Designator: unjf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
3110-00-293-8003	No Name Available	01/01/1960

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
3110PL1030929	Rod End Roller Bearing
MR4AB	Rod End Roller Bearing
MR4ABMILG3278	Rod End Roller Bearing
SM4-6AP1-501	Rod End Roller Bearing

FAQs

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

What is the FSCG of the NSN 3110-00-684-1840?

The FSCG of the NSN 3110-00-684-1840 is 3110

Does the NSN 3110-00-684-1840 have a Schedule B code assigned?

Yes, the Schedule B code is 8482500000

Does NSN 3110-00-684-1840 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 3110-00-684-1840 contain precious materials?

Item does not contain precious metal.

Does NSN 3110-00-684-1840 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 3110-00-684-1840 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963