55303M Self-Aligning Plain Bearing

Comprehensive specifications and application details for: 55303M Self-Aligning Plain Bearing.

Summary

Explore detailed summary information for bearing: 55303M. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: 55303M
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-01-040-8740
Item Name Code: 13208
Federal Item Identification Guide: A045A0
Assigment Date: 05/16/1977

A detachable assembly in or on which a journal, gudgeon, pivot, or the like moves. It is used to carry a load and to reduce sliding friction. It does not employ rolling elements. The item consists of a bored precision ground ball (or spherical plain bearing) around which an outer ring is fitted. The assembly may be either separable or nonseparable. Excludes:bearing, plain, rod end and bearing, plain, spherical.

50.0 rockwell c minimum and 60.0 rockwell c maximum inner member hardness rating, 0.4320 inches minimum and 0.4370 inches maximum inner member width, 0.2495 inches minimum and 0.2500 inches maximum bore diameter, bms 3-8, mcdonnell douglas corp, mcdonnell aircraft division mfr ref single material response lubrication material document and classification, 28.0 rockwell c minimum and 36.0 rockwell c maximum outer race member hardness rating

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-01-040-8740 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter: 0.2495 inches minimum and 0.2500 inches maximum
Hardness Rating: 50.0 rockwell c minimum and 60.0 rockwell c maximum inner member
Hardness Rating: 28.0 rockwell c minimum and 36.0 rockwell c maximum outer race member
Inner Member Width: 0.4320 inches minimum and 0.4370 inches maximum
Material Document And Classification: bms 3-8, mcdonnell douglas corp, mcdonnell aircraft division mfr ref single material response lubrication
Material: lubricant dry film lubrication
Material: steel comp 440c inner member
Material: steel comp 630 outer race member
Outer Member Outside Diameter: 0.6245 inches minimum and 0.6250 inches maximum
Outer Member Width: 0.3220 inches minimum and 0.3320 inches maximum
Static Radial Load Rating: 17500 pounds
Style Designator: without insert or liner

Replaces

The NSN 3120-01-040-8740 is used in place of the following discontinued or alternate items:

NSN	Name	Date
3120-01-034-5028	No Name Available	11/01/1994

Frequently Asked Questions

Find quick answers to common questions about bearing: 55303M. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-01-040-8740?: The FSCG of the NSN 3120-01-040-8740 is 3120

Does the NSN 3120-01-040-8740 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-01-040-8740 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 3120-01-040-8740 contain precious materials?: Precious metal content is unknown

Does NSN 3120-01-040-8740 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.