PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

638731Bearing Half,sleeve

Am General Llc · NSN 3120-00-737-1225 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-737-1225 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-737-1225. Primary manufacturer part number: 638731.
Features
  • Bearing Half,sleeve — FSC 3120
  • Surface Groove Location and Quantity: 1 INTERNAL
  • Antirotation/lubrication Type and Quantity: 1 SLOT
  • Style Designator: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
  • Slot Length: 0.2780 INCHES MINIMUM AND 0.2820 INCHES MAXIMUM FIRST IN
  • Corner Shape: SQUARE ALL CORNERS
  • Distance From Centerline of Opening to Left End of Bearing: 0.0625 INCHES NOMINAL FIRST IN
  • Body Inside Diameter: 2.3355 INCHES MINIMUM AND 2.3360 INCHES MAXIMUM IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Tin Alloy Inner Layer construction
General Description

The Bearing Half,sleeve, cataloged under National Stock Number 3120-00-737-1225, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Am General Llc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-737-1225
Primary Part Number638731
Item NameBearing Half,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerAm General Llc
StatusACTIVE
Surface Groove Location and Quantity1 INTERNAL
Antirotation/lubrication Type and Quantity1 SLOT
Style DesignatorHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
Slot Length0.2780 INCHES MINIMUM AND 0.2820 INCHES MAXIMUM FIRST IN
Corner ShapeSQUARE ALL CORNERS
Distance From Centerline of Opening to Left End of Bearing0.0625 INCHES NOMINAL FIRST IN
Body Inside Diameter2.3355 INCHES MINIMUM AND 2.3360 INCHES MAXIMUM IN
Surface TreatmentOXIDE OR TIN EXTERNAL SURFACE MEMBER
MaterialTIN ALLOY INNER LAYER
MaterialSTEEL OUTER LAYER
Body Outside Diameter2.4900 INCHES NOMINAL IN
Slot Width0.2500 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM FIRST IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5130-00-018-5851 INTERCHANGEABLE
Bit,wire Wrapping Tool
3431-00-102-2318PRS45V44 INTERCHANGEABLE
Collet Body,welding Torch
Linde Gas & Equipment Inc. Dba Linde Gas & Equipment
5985-00-152-792310623-1 INTERCHANGEABLE
Attenuator,fixed
Alliant Techsystems Operations Llc Div Defense Electronic Systems
5975-00-177-6408TC724A INTERCHANGEABLE
Box Connector,electrical
Abb Installation Products Inc
5935-00-227-89951431373 INTERCHANGEABLE
Connector,receptacle,electrical
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6130-00-233-7622 INTERCHANGEABLE
Rectifier,metallic
5985-00-313-31452-050-3 INTERCHANGEABLE
Line Section,radio Frequency Tra
Myat, Inc. Dba Myat Inc
4730-00-375-4870 INTERCHANGEABLE
Strainer Element,sediment
2940-00-420-483542581 INTERCHANGEABLE
Filter Element,intake Air Cleane
Wix Corp
3020-00-809-240220503 INTERCHANGEABLE
Gear,spur
Naval Inventory Control Point Mechanicsburg
Cross-Reference Index
Part NumberManufacturer
638731 PRIMARY Am General Llc (USA)
GPW6341A Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
20503 Jpi Transportation Products Inc (USA)
7371225 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
GPW6341A Ford Motor Company (USA)
Related Parts
5130-00-018-5851INTERCHANGEABLE
BIT,WIRE WRAPPING TOOL
3431-00-102-2318INTERCHANGEABLE
COLLET BODY,WELDING TORCH
PRS45V44
5985-00-152-7923INTERCHANGEABLE
ATTENUATOR,FIXED
10623-1
5975-00-177-6408INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
TC724A
5935-00-227-8995INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
1431373
6130-00-233-7622INTERCHANGEABLE
RECTIFIER,METALLIC
5985-00-313-3145INTERCHANGEABLE
LINE SECTION,RADIO FREQUENCY TRA
2-050-3
4730-00-375-4870INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
2940-00-420-4835INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
42581
3020-00-809-2402INTERCHANGEABLE
GEAR,SPUR
20503
5940-00-828-9012INTERCHANGEABLE
TERMINAL,STUD
5365-01-026-6835INTERCHANGEABLE
SPACER,CABLE,GUARD,ELEVATOR,QUAD
63-8731

Frequently Asked Questions

What is NSN 3120-00-737-1225?

NSN 3120-00-737-1225 is a Bearing Half,sleeve, manufactured by Am General Llc, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-737-1225?

NSN 3120-00-737-1225 has 5 cross-referenced part numbers: 638731 (Am General Llc), GPW6341A (Ford Motor Co Ford Parts and Service Div Government Part Sales), 20503 (Jpi Transportation Products Inc), 7371225 (U S Army Tank Automotive Command Amsta-Im-Mm), GPW6341A (Ford Motor Company).

What NSN replaces 3120-00-737-1225?

There are 12 known substitutes for 3120-00-737-1225: 5130-00-018-5851, 3431-00-102-2318, 5985-00-152-7923 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 638731?

Key specifications for 638731: Surface Groove Location and Quantity: 1 INTERNAL; Antirotation/lubrication Type and Quantity: 1 SLOT; Style Designator: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES; Slot Length: 0.2780 INCHES MINIMUM AND 0.2820 INCHES MAXIMUM FIRST IN. 13 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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