PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

45503Impeller,pump,centrifugal

Howden American Fan Company Dba American Fan Co Div Howden Usa Company · NSN 4320-01-437-8934 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-437-8934 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-437-8934. Primary manufacturer part number: 45503.
Features
  • Impeller,pump,centrifugal — FSC 4320
  • Rotation Direction for Which Designed: COUNTERCLOCKWISE
  • Hub Location: CENTRALLY
  • Blade Quantity: 7
  • Design Type: SINGLE WIDTH
  • Hub Quantity: 1
  • Hub Bore Diameter: 0.625 INCHES NOMINAL IN
  • Overall Diameter: 18.250 INCHES NOMINAL IN
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-437-8934, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Howden American Fan Company Dba American Fan Co Div Howden Usa Company. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-01-437-8934
Primary Part Number45503
Item NameImpeller,pump,centrifugal
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerHowden American Fan Company Dba American Fan Co Div Howden Usa Company
StatusACTIVE
Rotation Direction for Which DesignedCOUNTERCLOCKWISE
Hub LocationCENTRALLY
Blade Quantity7
Design TypeSINGLE WIDTH
Hub Quantity1
Hub Bore Diameter0.625 INCHES NOMINAL IN
Overall Diameter18.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-391-858045503 INTERCHANGEABLE
Nut,plain,round
Northrop Grumman Systems Corporation Div Marine Systems
3455-00-517-53661-1561-1250 INTERCHANGEABLE
Cutter,milling,woodruff Keyseat
New York Twist Drill Inc
5340-01-259-653245503 INTERCHANGEABLE
Clevis,rod End
Jergens Inc Div Tooling Components Division
5330-01-442-578145503 INTERCHANGEABLE
Retainer,packing
Tenneco Inc
4320-01-442-978015JG-946304N INTERCHANGEABLE
Impeller,pump,centrifugal
Howden American Fan Company Dba American Fan Co Div Howden Usa Company
Cross-Reference Index
Part NumberManufacturer
WAB4255A Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA)
45503 PRIMARY Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA)
45503-12DEG. PRIMARY Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA)
Related Parts
5310-00-391-8580INTERCHANGEABLE
NUT,PLAIN,ROUND
45503
3455-00-517-5366INTERCHANGEABLE
CUTTER,MILLING,WOODRUFF KEYSEAT
1-1561-1250
5340-01-259-6532INTERCHANGEABLE
CLEVIS,ROD END
45503
5330-01-442-5781INTERCHANGEABLE
RETAINER,PACKING
45503
4320-01-442-9780INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
15JG-946304N

Frequently Asked Questions

What is NSN 4320-01-437-8934?

NSN 4320-01-437-8934 is a Impeller,pump,centrifugal, manufactured by Howden American Fan Company Dba American Fan Co Div Howden Usa Company, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-437-8934?

NSN 4320-01-437-8934 has 3 cross-referenced part numbers: WAB4255A (Howden American Fan Company Dba American Fan Co Div Howden Usa Company), 45503 (Howden American Fan Company Dba American Fan Co Div Howden Usa Company), 45503-12DEG. (Howden American Fan Company Dba American Fan Co Div Howden Usa Company).

What NSN replaces 4320-01-437-8934?

There are 5 known substitutes for 4320-01-437-8934: 5310-00-391-8580, 3455-00-517-5366, 5340-01-259-6532 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 45503?

Key specifications for 45503: End Item Identification: AMERICAN FAN COMPANY 15JG FAN ASSEMBLY; Overall Width: 16.000 INCHES NOMINAL IN; Rotation Direction for Which Designed: COUNTERCLOCKWISE; Hub Location: CENTRALLY. 9 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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