KR4-CNGBC Self-Aligning Plain Bearing

Comprehensive specifications and application details for: KR4-CNGBC Self-Aligning Plain Bearing.

Summary

Explore detailed summary information for bearing: KR4-CNGBC. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: KR4-CNGBC
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-01-275-3422
Item Name Code: 13208
Federal Item Identification Guide: A045A0
Assigment Date: 03/21/1988

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.

28.0 rockwell c minimum and 37.0 rockwell c maximum outer race member hardness rating, 0.3410 inches minimum and 0.3430 inches maximum inner member width, 0.2495 inches minimum and 0.2500 inches maximum bore diameter, 43.0 rockwell c minimum and 47.0 rockwell c maximum inner member hardness rating, self-lubricating liner race liner lubrication feature

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-01-275-3422 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter: 0.2495 inches minimum and 0.2500 inches maximum
Hardness Rating: 43.0 rockwell c minimum and 47.0 rockwell c maximum inner member
Hardness Rating: 28.0 rockwell c minimum and 37.0 rockwell c maximum outer race member
Inner Member Width: 0.3410 inches minimum and 0.3430 inches maximum
Lubrication Feature: self-lubricating liner race liner
Material Document And Classification: ams 5629 assn std single material response inner member
Material Document And Classification: ams 5643 assn std single material response outer race member
Material: plastic polytetrafluoroethylene race liner
Material: steel comp 630 outer race member
Material: steel comp xm-13 inner member
Outer Member Outside Diameter: 0.6557 inches minimum and 0.6562 inches maximum
Outer Member Width: 0.2450 inches minimum and 0.2550 inches maximum
Static Radial Load Rating: 6040 pounds
Style Designator: with insert and/or liner with staking groove

Frequently Asked Questions

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What is the FSCG of the NSN 3120-01-275-3422?: The FSCG of the NSN 3120-01-275-3422 is 3120

Does the NSN 3120-01-275-3422 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-01-275-3422 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 3120-01-275-3422 contain precious materials?: Item does not contain precious metal.

Does NSN 3120-01-275-3422 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 3120-01-275-3422 was assigned to the Federal Catalog?: It was assigned 38 years ago, on Mon, Mar 21, 1988

Price & Availability

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Stock Availability

This product is available in the following quantities and conditions:

New Surplus	4
New Material	784
Total	788

Availability of this item was last updated on: 04/20/2026 11:04 AM EDT. Availability may have changed since then. Request a quote for up to date pricing and availability.