PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

104Impeller,pump,centrifugal

W S Darley & Co · NSN 4320-00-588-0638 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-588-0638 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-588-0638. Primary manufacturer part number: 104.
Features
  • Impeller,pump,centrifugal — FSC 4320
  • Hub Quantity: 1
  • Hub Bore Diameter: 1.000 INCHES NOMINAL IN
  • Design Type: SINGLE WIDTH
  • Keyway Quantity: 1
  • Keyway Type: STRAIGHT
  • Mounting Method: KEY
  • Hub Location: CENTERED
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
  • Applications requiring Copper Alloy construction
General Description

The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-00-588-0638, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is W S Darley & Co. Government technical data includes 15 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-588-0638
Primary Part Number104
Item NameImpeller,pump,centrifugal
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerW S Darley & Co
StatusACTIVE
Hub Quantity1
Hub Bore Diameter1.000 INCHES NOMINAL IN
Design TypeSINGLE WIDTH
Keyway Quantity1
Keyway TypeSTRAIGHT
Mounting MethodKEY
Hub LocationCENTERED
Blade Quantity6
Blade TypeRADIAL TIP
Hub Length1.812 INCHES NOMINAL IN
Keyway Length0.094 INCHES NOMINAL IN
Rotation Direction for Which DesignedCLOCKWISE
Overall Diameter7.969 INCHES NOMINAL IN
MaterialCOPPER ALLOY
Keyway Width0.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5120-00-017-3927 INTERCHANGEABLE
Contact Positioner,terminal Crim
6515-00-064-0951 INTERCHANGEABLE
Tube,colon,surgical
5360-00-312-4845K42 INTERCHANGEABLE
Spring,helical,extension
The Dewey Electronics Corporation Div Pitometer Log Division
5999-00-907-5566K42 INTERCHANGEABLE
Heater,thermal Release
Siemens Energy and Automation Inc Siemens Furnas Controls Div
5120-01-335-8627K42 INTERCHANGEABLE
Contact Positioner,terminal Crim
Daniels Manufacturing Corporation
3460-01-344-2951K42 INTERCHANGEABLE
Wheel,abrasive
Sioux Tools Inc
5330-01-396-4356K-42 INTERCHANGEABLE
Parts Kit,seal Replacement,mecha
American Propulation Systems
Cross-Reference Index
Part NumberManufacturer
104 W S Darley & Co (USA)
104K42 W S Darley & Co (USA)
K42 W S Darley & Co (USA)
Related Parts
5120-00-017-3927INTERCHANGEABLE
CONTACT POSITIONER,TERMINAL CRIM
6515-00-064-0951INTERCHANGEABLE
TUBE,COLON,SURGICAL
5360-00-312-4845INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
K42
5999-00-907-5566INTERCHANGEABLE
HEATER,THERMAL RELEASE
K42
5120-01-335-8627INTERCHANGEABLE
CONTACT POSITIONER,TERMINAL CRIM
K42
3460-01-344-2951INTERCHANGEABLE
WHEEL,ABRASIVE
K42
5330-01-396-4356INTERCHANGEABLE
PARTS KIT,SEAL REPLACEMENT,MECHA
K-42

Frequently Asked Questions

What is NSN 4320-00-588-0638?

NSN 4320-00-588-0638 is a Impeller,pump,centrifugal, manufactured by W S Darley & Co, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-588-0638?

NSN 4320-00-588-0638 has 3 cross-referenced part numbers: 104 (W S Darley & Co), 104K42 (W S Darley & Co), K42 (W S Darley & Co).

What NSN replaces 4320-00-588-0638?

There are 7 known substitutes for 4320-00-588-0638: 5120-00-017-3927, 6515-00-064-0951, 5360-00-312-4845 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 104?

Key specifications for 104: Hub Quantity: 1; Overall Width: 1.812 INCHES NOMINAL IN; Hub Bore Diameter: 1.000 INCHES NOMINAL IN; Design Type: SINGLE WIDTH. 17 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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