PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

PT4-12Ball,bearing

W. M. Berg, Inc. · NSN 3110-00-248-5865 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-248-5865 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-248-5865. Primary manufacturer part number: PT4-12.
Features
  • Ball,bearing — FSC 3110
  • Rolling Element Diameter: 0.3750 INCHES NOMINAL IN
  • Standard Tolerance Designation: AFBMA STD TOLERANCE FOR BALLS, GRADE 10
  • Material: STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OVERALL A
  • Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Style Designator: BALL
  • 15 verified cross-references
  • Primary manufacturer: W. M. Berg, Inc.
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 440A or Steel Comp 440b or Steel Comp 440c Overall construction
General Description

The Ball,bearing, cataloged under National Stock Number 3110-00-248-5865, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is W. M. Berg, Inc.. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3110-00-248-5865
Primary Part NumberPT4-12
Item NameBall,bearing
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerW. M. Berg, Inc.
StatusCANCELLED
Rolling Element Diameter0.3750 INCHES NOMINAL IN
Standard Tolerance DesignationAFBMA STD TOLERANCE FOR BALLS, GRADE 10
MaterialSTEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OVERALL A
Material Document and ClassificationAISI ASSN STD ALL MATERIAL RESPONSES OVERALL
Style DesignatorBALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5315-00-017-7243 INTERCHANGEABLE
Pin,return Spring
1650-00-075-9547SP2860 INTERCHANGEABLE
Filter,fluid
Fluid Conditioning Products, Inc.
5360-00-392-0751A214416P11 INTERCHANGEABLE
Spring,helical,compression
Taylor Machine Works Inc
5330-00-679-1389 INTERCHANGEABLE
Gasket
3455-01-006-092640223 INTERCHANGEABLE
Cutter,milling,end
Niagara Cutter Inc
5330-01-023-069032025 INTERCHANGEABLE
Packing,preformed
Stone Construction Equipment, Inc.
5310-01-083-95091229-K-1597 INTERCHANGEABLE
Washer,flat
Meritor Industrial Products, Llc
5360-01-113-5700 INTERCHANGEABLE
Spring,helical,extension
4730-01-134-8876 INTERCHANGEABLE
Holder Assembly,hose
3110-01-200-329932025 INTERCHANGEABLE
Race
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
Cross-Reference Index
Part NumberManufacturer
PT4-12 W. M. Berg, Inc. (USA)
32025 Optronics Intl Inc (USA)
H8222 ITEM 126 Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (USA)
ASTM F2215 American Society for Testing and Materials Dba Astm International (USA)
40223 Madison-Kipp Corp (USA)
75206A10 Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (USA)
10163737 Nimikkeistokeskus Ncb Finland (FIN)
75206A Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (USA)
MS19060-1018 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
A-29355 Madison-Kipp Corp (USA)
S973 The Gorman-Rupp Company Div Gorman-Rupp (USA)
39298 Madison-Kipp Corp (USA)
MS19060-11 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
3/8 BALL GRADE 50 Skf Usa Inc. (USA)
3/8 IN BALL GRADE 1 Skf Usa Inc. (USA)
Related Parts
5315-00-017-7243INTERCHANGEABLE
PIN,RETURN SPRING
1650-00-075-9547INTERCHANGEABLE
FILTER,FLUID
SP2860
5360-00-392-0751INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
A214416P11
5330-00-679-1389INTERCHANGEABLE
GASKET
3455-01-006-0926INTERCHANGEABLE
CUTTER,MILLING,END
40223
5330-01-023-0690INTERCHANGEABLE
PACKING,PREFORMED
32025
5310-01-083-9509INTERCHANGEABLE
WASHER,FLAT
1229-K-1597
5360-01-113-5700INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
4730-01-134-8876INTERCHANGEABLE
HOLDER ASSEMBLY,HOSE
3110-01-200-3299INTERCHANGEABLE
RACE
32025
5962-01-225-6751INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
40223
5965-01-250-8542INTERCHANGEABLE
LOUDSPEAKER ASSEMBLY

Frequently Asked Questions

What is NSN 3110-00-248-5865?

NSN 3110-00-248-5865 is a Ball,bearing, manufactured by W. M. Berg, Inc., classified under FSC 3110 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3110-00-248-5865?

NSN 3110-00-248-5865 has 15 cross-referenced part numbers: PT4-12 (W. M. Berg, Inc.), 32025 (Optronics Intl Inc), H8222 ITEM 126 (Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture), ASTM F2215 (American Society for Testing and Materials Dba Astm International), 40223 (Madison-Kipp Corp) and 10 more.

What NSN replaces 3110-00-248-5865?

There are 12 known substitutes for 3110-00-248-5865: 5315-00-017-7243, 1650-00-075-9547, 5360-00-392-0751 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of PT4-12?

Key specifications for PT4-12: Rolling Element Diameter: 0.3750 INCHES NOMINAL IN; Standard Tolerance Designation: AFBMA STD TOLERANCE FOR BALLS, GRADE 10; Material: STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OVERALL A; Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3110-00-248-5865 still in active supply?

NSN 3110-00-248-5865 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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