21918

View detailed technical data, stock status, and sourcing information for: 21918
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-00-083-8917

Item Name Code

13209

Assigment Date

01/01/1963 (63 years ago)

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 outer member of the assembly is modified to provide a shank. The inner member may be either a plain spherical bearing or a sleeve bearing. Excludes:bearing, plain, spherical and bearing, plain, self-aligning.

6.2800 inches nominal overall length, 0.9995 inches minimum and 1.0000 inches maximum bore diameter, 3a thread class, externally threaded shank style, right-hand thread direction

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 Style: externally threaded
Overall Length: 6.2800 inches nominal
Bore Diameter: 0.9995 inches minimum and 1.0000 inches maximum
Outer Member Outside Diameter: 2.5000 inches nominal
Bore Center To Shank End Distance: 5.0300 inches nominal
Outer Member Width: 0.7990 inches minimum and 0.8090 inches maximum
Inner Member Width: 0.9980 inches minimum and 1.0000 inches maximum
Shank Thread Length: 3.1250 inches nominal
Static Radial Load Rating: 32200 pounds
Thread Diameter: 1.250 inches nominal
Thread Quantity Per Inch: 18
Hardness Rating: 55.0 rockwell c minimum and 62.0 rockwell c maximum inner member
Hardness Rating: 20.0 rockwell c minimum and 35.0 rockwell c maximum race insert
Material: plastic polytetrafluoroethylene race liner
Material: steel comp 4130 internal rod end body
Material: steel comp 440c inner member
Material: steel comp 631 or steel comp 630 race insert
Surface Treatment: cadmium rod end body
Style Designator: ball type
Thread Series Designator: unef

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
21918	Rod End Plain Bearing

FAQs

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

What is the FSCG of the NSN 3120-00-083-8917?

The FSCG of the NSN 3120-00-083-8917 is 3120

Does the NSN 3120-00-083-8917 have a Schedule B code assigned?

Yes, the Schedule B code is 8483308055

Does NSN 3120-00-083-8917 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 3120-00-083-8917 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-00-083-8917 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 3120-00-083-8917 was assigned to the Federal Catalog?

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