PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A1588Impeller,pump,centrifugal

Weil Pump Co Inc · NSN 4320-00-069-2027 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-069-2027 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-069-2027. Primary manufacturer part number: A1588.
Features
  • Impeller,pump,centrifugal — FSC 4320
  • Keyway Width: 0.125 INCHES NOMINAL IN
  • Hub Quantity: 2
  • Hub Projection Length Beyond Wheel Side: 0.500 INCHES NOMINAL AND 0.625 INCHES NOMINAL IN
  • Keyway Quantity: 1
  • Design Type: SINGLE WIDTH
  • Keyway Depth: 0.625 INCHES NOMINAL IN
  • Hub Location: BACK SIDE AND FRONT SIDE
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 4320-00-069-2027, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Weil Pump Co Inc. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-069-2027
Primary Part NumberA1588
Item NameImpeller,pump,centrifugal
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerWeil Pump Co Inc
StatusACTIVE
Keyway Width0.125 INCHES NOMINAL IN
Hub Quantity2
Hub Projection Length Beyond Wheel Side0.500 INCHES NOMINAL AND 0.625 INCHES NOMINAL IN
Keyway Quantity1
Design TypeSINGLE WIDTH
Keyway Depth0.625 INCHES NOMINAL IN
Hub LocationBACK SIDE AND FRONT SIDE
Blade TypeFORWARD CURVE
Hub Length0.500 INCHES NOMINAL AND 0.625 INCHES NOMINAL IN
Keyway TypeSQUARE
Hub Bore Diameter1.375 INCHES NOMINAL AND 3.000 INCHES NOMINAL IN
MaterialCOPPER ALLOY
Mounting MethodKEY
Rotation Direction for Which DesignedCLOCKWISE
Blade Quantity5
Keyway Length1.937 INCHES NOMINAL IN
Overall Diameter5.062 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
4320-00-069-2026A1588-3-875 INTERCHANGEABLE
Impeller,pump,centrifugal
Weil Pump Co Inc
5310-00-209-414523374 INTERCHANGEABLE
Washer,key
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5310-00-318-8473A1588 INTERCHANGEABLE
Washer,lock
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
8455-01-018-8737 INTERCHANGEABLE
Insignia,shoulder Sleeve
5310-01-176-8059A1588 INTERCHANGEABLE
Washer,flat
Datamarine Intl Inc
5325-01-233-3008A1588 INTERCHANGEABLE
Eyelet,metallic
Edwin B. Stimpson Company, Inc. Dba Stimpson
5120-01-297-7910A257-1 INTERCHANGEABLE
Handle,driver
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
8455-01-660-5778 INTERCHANGEABLE
Insignia,shoulder Sleeve
8455-01-714-7201 INTERCHANGEABLE
Insignia,shoulder Sleeve
8455-01-714-7209 INTERCHANGEABLE
Insignia,shoulder Sleeve
Cross-Reference Index
Part NumberManufacturer
A1588 PRIMARY Weil Pump Co Inc (USA)
Related Parts
4320-00-069-2026INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A1588-3-875
5310-00-209-4145INTERCHANGEABLE
WASHER,KEY
23374
5310-00-318-8473INTERCHANGEABLE
WASHER,LOCK
A1588
8455-01-018-8737INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
5310-01-176-8059INTERCHANGEABLE
WASHER,FLAT
A1588
5325-01-233-3008INTERCHANGEABLE
EYELET,METALLIC
A1588
5120-01-297-7910INTERCHANGEABLE
HANDLE,DRIVER
A257-1
8455-01-660-5778INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
8455-01-714-7201INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
8455-01-714-7209INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE

Frequently Asked Questions

What is NSN 4320-00-069-2027?

NSN 4320-00-069-2027 is a Impeller,pump,centrifugal, manufactured by Weil Pump Co Inc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-069-2027?

NSN 4320-00-069-2027 has 1 cross-referenced part number: A1588 (Weil Pump Co Inc).

What NSN replaces 4320-00-069-2027?

There are 10 known substitutes for 4320-00-069-2027: 4320-00-069-2026, 5310-00-209-4145, 5310-00-318-8473 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A1588?

Key specifications for A1588: Keyway Width: 0.125 INCHES NOMINAL IN; Hub Quantity: 2; Hub Projection Length Beyond Wheel Side: 0.500 INCHES NOMINAL AND 0.625 INCHES NOMINAL IN; Keyway Quantity: 1. 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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