MS21154S7 Self-Aligning Plain Bearing

Comprehensive specifications and application details for: MS21154S7 Self-Aligning Plain Bearing.

Summary

Explore detailed summary information for bearing: MS21154S7. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: MS21154S7
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-01-356-3229
Item Name Code: 13208
Federal Item Identification Guide: A045A0
Assigment Date: 04/02/1992

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.

0.4370 inches minimum and 0.4375 inches maximum bore diameter, 0.4350 inches minimum and 0.4370 inches maximum inner member width, groove external outer member lubrication feature, 27.0 rockwell c minimum and 36.0 rockwell c maximum outer race member hardness rating, 56.0 rockwell c minimum inner member hardness rating

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-01-356-3229 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter: 0.4370 inches minimum and 0.4375 inches maximum
Hardness Rating: 56.0 rockwell c minimum inner member
Hardness Rating: 27.0 rockwell c minimum and 36.0 rockwell c maximum outer race member
Inner Member Width: 0.4350 inches minimum and 0.4370 inches maximum
Lubrication Feature: groove external outer member
Lubrication Feature: groove internal inner member
Lubrication Feature: groove internal outer member
Lubrication Feature: perforation outer race member
Lubrication Feature: perforation inner member
Material Document And Classification: ans 5630 assn std single material response inner member
Material Document And Classification: mil-g-21164 mil spec single material response lubrication
Material Document And Classification: mil-s-6758 mil spec 1st material response or mil-s-6758 mil spec 2nd material response or mil-s-6050 mil spec 3rd material response outer race member
Material: grease and disulfide molybdenum lubrication
Material: steel comp 440c inner member
Material: steel comp e4340 or steel comp 4130 or steel comp 8630 outer race member
Outer Member Outside Diameter: 0.9057 inches minimum and 0.9062 inches maximum
Outer Member Width: 0.3380 inches minimum and 0.3480 inches maximum
Static Radial Load Rating: 18850 pounds
Style Designator: without insert or liner with staking groove
Surface Treatment Document And Classification: qq-c-320,cl 2 ty 1 fed spec single treatment response or qq-c-320,cl 2 ty 2 fed spec single treatment response inner member
Surface Treatment Document And Classification: qq-p-416,ty1 cl 2 fed spec single treatment response outer race member
Surface Treatment: cadmium outer race member
Surface Treatment: chromium inner member

Frequently Asked Questions

Find quick answers to common questions about bearing: MS21154S7. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-01-356-3229?: The FSCG of the NSN 3120-01-356-3229 is 3120

Does the NSN 3120-01-356-3229 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-01-356-3229 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 3120-01-356-3229 contain precious materials?: Item does not contain precious metal.

Does NSN 3120-01-356-3229 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 3120-01-356-3229 was assigned to the Federal Catalog?: It was assigned 34 years ago, on Thu, Apr 2, 1992

Price & Availability

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Stock Availability

This product is available in the following quantities and conditions:

New Material	45
New Surplus	1
Total	46

Availability of this item was last updated on: 03/23/2026 06:03 PM EDT. Availability may have changed since then. Request a quote for up to date pricing and availability.