MB540

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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-00-690-7298

Item Name Code

00041

Assigment Date

01/01/1960 (66 years ago)

A cylindrical item in which the inner or outer ring turns upon row(s) of hardened roller, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes:bearing,roller,cylindrical.

0.2450 inches minimum and 0.2500 inches maximum outer ring width, radial load direction, 0.8745 inches minimum and 0.8750 inches maximum bore diameter, 1.3120 inches minimum and 1.3125 inches maximum overall outside diameter, 0.2785 inches minimum and 0.2810 inches maximum inner ring width

Product Characteristics

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

Bore Diameter: 0.8745 inches minimum and 0.8750 inches maximum
Overall Outside Diameter: 1.3120 inches minimum and 1.3125 inches maximum
Outer Ring Width: 0.2450 inches minimum and 0.2500 inches maximum
Inner Ring Width: 0.2785 inches minimum and 0.2810 inches maximum
Load Direction: radial
Special Features: 0.0001 in. min 0.0005 in. max internal clearance
Material: steel overall
Style Designator: single row, torque tube type, w/or w/o closure

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
MB540	Airframe Ball Bearing
MB540-1L1	Airframe Ball Bearing
MB540FS160	Airframe Ball Bearing

FAQs

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

What is the FSCG of the NSN 3110-00-690-7298?

The FSCG of the NSN 3110-00-690-7298 is 3110

Does the NSN 3110-00-690-7298 have a Schedule B code assigned?

Yes, the Schedule B code is 8482105068

Does NSN 3110-00-690-7298 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 3110-00-690-7298 contain precious materials?

Item does not contain precious metal.

Does NSN 3110-00-690-7298 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 3110-00-690-7298 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960