39381-31

View detailed technical data, stock status, and sourcing information for: 39381-31
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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-01-028-2506

Item Name Code

00050

Assigment Date

09/28/1976 (49 years ago)

Two single row annular ball bearings selected dimensionally to be a matched pair or set. The ring faces have been specially ground to specified offsets that will produce predetermined preload when mounted. May include a single row angular contact bearing with faces specially ground for duplex mounting.

0.4370 inches nominal shank diameter, 3b thread class, 1.7000 inches minimum and 1.7950 inches maximum overall length, internally 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: 3b
Thread Direction: right-hand
Shank Diameter: 0.4370 inches nominal
Shank Style: internally threaded
Overall Length: 1.7000 inches minimum and 1.7950 inches maximum
Bore Diameter: 0.2495 inches minimum and 0.2500 inches maximum
Overall Outside Diameter: 0.7500 inches minimum and 0.8000 inches maximum
Shank Thread Length: 0.7500 inches minimum and 0.8100 inches maximum
Outer Ring Width: 0.3350 inches minimum and 0.3500 inches maximum
Inner Ring Width: 0.4320 inches minimum and 0.4370 inches maximum
Length From Bore Center To Shank End: 1.3650 inches minimum and 1.3950 inches maximum
Seal Quantity: 2
Shield Quantity: 2
Bearing Seal Type: contact
Alignment Type: self-aligning
Self-Alignment Location: internal
Width Across Flats: 0.4370 inches nominal
Thread Quantity Per Inch: 28
Nominal Thread Size: 0.250 inches
Self-Alignment Angle: 10.00 degrees nominal
Special Features: 0.0700 in. dia inspection hole in shank,0.0670 in. max wide by 0.0610 in. max deep slot in center of hex,two 0.0460 in. dia lockwire holes in hex end,internal radial play 0.0002 in. to 0.0010 in.
Lubrication Material: grease
Lubrication Material Document And Classification: mil-g-23827 mil spec single material response
Material: plastic tetrafluoroethylene seal
Material: steel comp 4620 rod end body
Material: steel snap ring
Material: steel comp e52100 inner ring
Material: steel comp e52100 roller
Material Document And Classification: mil-s-7420 mil spec single material response inner ring
Material Document And Classification: mil-s-7420 mil spec single material response roller
Material Document And Classification: mil-s-7493 mil spec single material response rod end body
Material Document And Classification: qq-s-763 fed spec single material response shield
Surface Treatment: cadmium all external/exposed metal surfaces
Surface Treatment Document And Classification: qq-p-416,ty 1,cl 2 fed spec single treatment response all external/exposed metal surfaces
Style Designator: single row, concave rollers
Thread Series Designator: unjf

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
39381-31	Rod End Roller Bearing
SF4-4A1-503	Rod End Roller Bearing

FAQs

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

What is the FSCG of the NSN 3110-01-028-2506?

The FSCG of the NSN 3110-01-028-2506 is 3110

Does the NSN 3110-01-028-2506 have a Schedule B code assigned?

Yes, the Schedule B code is 8482500000

Does NSN 3110-01-028-2506 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 3110-01-028-2506 contain precious materials?

Item does not contain precious metal.

Does NSN 3110-01-028-2506 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 3110-01-028-2506 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Tue, Sep 28, 1976