PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2251521Hub,pump

Fairbanks Morse, Llc · NSN 4320-00-441-3191 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-441-3191 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-441-3191. Primary manufacturer part number: 2251521.
Features
  • Hub,pump — FSC 4320
  • General Characteristics Item Description: RUBBER,SYNTHETIC,2.375 IN.OD,1.906 IN.ID,0.562 IN.W,0.375 IN.W GROOVE,0.062 IN. GROOVE DEPTH IN
  • 2 verified cross-references
  • Primary manufacturer: Fairbanks Morse, Llc
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Hub,pump, cataloged under National Stock Number 4320-00-441-3191, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-441-3191
Primary Part Number2251521
Item NameHub,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerFairbanks Morse, Llc
StatusACTIVE
General Characteristics Item DescriptionRUBBER,SYNTHETIC,2.375 IN.OD,1.906 IN.ID,0.562 IN.W,0.375 IN.W GROOVE,0.062 IN. GROOVE DEPTH IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5905-00-138-960722527 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
General Dynamics Motion Control Llc
Cross-Reference Index
Part NumberManufacturer
2251521 Fairbanks Morse, Llc (USA)
2251521 Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco (USA)
Related Parts
5905-00-138-9607INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
22527

Frequently Asked Questions

What is NSN 4320-00-441-3191?

NSN 4320-00-441-3191 is a Hub,pump, manufactured by Fairbanks Morse, Llc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-441-3191?

NSN 4320-00-441-3191 has 2 cross-referenced part numbers: 2251521 (Fairbanks Morse, Llc), 2251521 (Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco).

What NSN replaces 4320-00-441-3191?

There is 1 known substitute for 4320-00-441-3191: 5905-00-138-9607. Verify interchangeability with system specifications before substitution.

What are the specifications of 2251521?

Key specifications for 2251521: General Characteristics Item Description: RUBBER,SYNTHETIC,2.375 IN.OD,1.906 IN.ID,0.562 IN.W,0.375 IN.W GROOVE,0.062 IN. GROOVE DEPTH IN. 1 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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