1998372 ITEM 51

View detailed technical data, stock status, and sourcing information for: 1998372 ITEM 51
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Federal Supply Group

Bearings

Federal Supply Classification

3120 Unmounted Plain Bearings

National Stock Number

3120-01-013-4051

Item Name Code

13209

Assigment Date

12/03/1975 (50 years ago)

An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes:straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.

2b thread class, 0.2495 inches minimum and 0.2525 inches maximum bore diameter, right-hand thread direction, 1.6870 inches nominal overall length, internally threaded w/ hexagon end shank style

Product Characteristics

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

Thread Class: 2b
Thread Direction: right-hand
Shank Style: internally threaded w/ hexagon end
Overall Length: 1.6870 inches nominal
Bore Diameter: 0.2495 inches minimum and 0.2525 inches maximum
Outer Member Outside Diameter: 0.7400 inches minimum and 0.7600 inches maximum
Bore Center To Shank End Distance: 1.2970 inches minimum and 1.3270 inches maximum
Outer Member Width: 0.2760 inches minimum and 0.2860 inches maximum
Inner Member Width: 0.3700 inches minimum and 0.3800 inches maximum
Shank Thread Length: 0.7500 inches nominal
Shank Width Across Wrench Flats: 0.4680 inches nominal
Static Radial Load Rating: 2400 pounds
Thread Diameter: 0.250 inches nominal
Features Provided: external lubrication fitting
Thread Quantity Per Inch: 28
Material: steel inner member
Material: steel rod end body
Surface Treatment: cadmium rod end body
Style Designator: ball type
Thread Series Designator: unf

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
1998372 ITEM 51	Rod End Plain Bearing
FR4N	Rod End Plain Bearing

FAQs

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

What is the FSCG of the NSN 3120-01-013-4051?

The FSCG of the NSN 3120-01-013-4051 is 3120

Does the NSN 3120-01-013-4051 have a Schedule B code assigned?

Yes, the Schedule B code is 8483308055

Does NSN 3120-01-013-4051 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 3120-01-013-4051 contain precious materials?

Item does not contain precious metal.

Does NSN 3120-01-013-4051 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 3120-01-013-4051 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Wed, Dec 3, 1975