PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18AM03Pump Unit,rotary

Lewis Pump Co. Inc. Dba Lewis Pump Co. Inc · NSN 4320-01-205-0525 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-205-0525 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-205-0525. Primary manufacturer part number: 18AM03.
Features
  • Pump Unit,rotary — FSC 4320
  • Maximum Discharge Flow Rate: 4.5 GALLONS PER MINUTE
  • Discharge Pressure: 2.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES
  • 6 verified cross-references
  • Primary manufacturer: Lewis Pump Co. Inc. Dba Lewis Pump Co. Inc
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Pump Unit,rotary, cataloged under National Stock Number 4320-01-205-0525, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Lewis Pump Co. Inc. Dba Lewis Pump Co. Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-01-205-0525
Primary Part Number18AM03
Item NamePump Unit,rotary
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerLewis Pump Co. Inc. Dba Lewis Pump Co. Inc
StatusACTIVE
Maximum Discharge Flow Rate4.5 GALLONS PER MINUTE
Discharge Pressure2.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4320-00-242-6390E3428V1B INTERCHANGEABLE
Pump Unit,rotary
Naval Inventory Control Point Mechanicsburg
4320-00-431-0373 INTERCHANGEABLE
Pump Unit,rotary
4320-00-435-7948BA1250 INTERCHANGEABLE
Pump Unit,rotary
Viking Pump, Inc
4320-00-442-2723BA1285 INTERCHANGEABLE
Pump Unit,rotary
Viking Pump, Inc
4320-00-449-1178 INTERCHANGEABLE
Pump Unit,rotary
4320-00-478-0066E3429 INTERCHANGEABLE
Pump Unit,rotary
Naval Inventory Control Point Mechanicsburg
4320-00-554-6869 INTERCHANGEABLE
Pump,rotary
4320-00-579-3429 INTERCHANGEABLE
Pump Unit,rotary
4320-00-839-1601SG3855 INTERCHANGEABLE
Pump Unit,rotary
Circor Pumps North America Llc
4320-00-922-5939 INTERCHANGEABLE
Pump Unit,rotary
Cross-Reference Index
Part NumberManufacturer
18AM03 Lewis Pump Co. Inc. Dba Lewis Pump Co. Inc (USA)
18AM03 Cascade Machinery & Electric, Inc. Dba Cascade Machinery & Electric Inc (USA)
18AM03 Roper Industries Inc Roper Pump Co Div (USA)
MILP19131 4.5GP Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-P-19131 4.5GPM 12PSI Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-P-19131 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4320-00-242-6390INTERCHANGEABLE
PUMP UNIT,ROTARY
E3428V1B
4320-00-431-0373INTERCHANGEABLE
PUMP UNIT,ROTARY
4320-00-435-7948INTERCHANGEABLE
PUMP UNIT,ROTARY
BA1250
4320-00-442-2723INTERCHANGEABLE
PUMP UNIT,ROTARY
BA1285
4320-00-449-1178INTERCHANGEABLE
PUMP UNIT,ROTARY
4320-00-478-0066INTERCHANGEABLE
PUMP UNIT,ROTARY
E3429
4320-00-554-6869INTERCHANGEABLE
PUMP,ROTARY
4320-00-579-3429INTERCHANGEABLE
PUMP UNIT,ROTARY
4320-00-839-1601INTERCHANGEABLE
PUMP UNIT,ROTARY
SG3855
4320-00-922-5939INTERCHANGEABLE
PUMP UNIT,ROTARY
4320-01-145-6471INTERCHANGEABLE
PUMP,ROTARY
4320-01-190-7096INTERCHANGEABLE
PUMP,ROTARY
E-4027F

Frequently Asked Questions

What is NSN 4320-01-205-0525?

NSN 4320-01-205-0525 is a Pump Unit,rotary, manufactured by Lewis Pump Co. Inc. Dba Lewis Pump Co. Inc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-205-0525?

NSN 4320-01-205-0525 has 6 cross-referenced part numbers: 18AM03 (Lewis Pump Co. Inc. Dba Lewis Pump Co. Inc), 18AM03 (Cascade Machinery & Electric, Inc. Dba Cascade Machinery & Electric Inc), 18AM03 (Roper Industries Inc Roper Pump Co Div), MILP19131 4.5GP (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-P-19131 4.5GPM 12PSI (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 4320-01-205-0525?

There are 12 known substitutes for 4320-01-205-0525: 4320-00-242-6390, 4320-00-431-0373, 4320-00-435-7948 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18AM03?

Key specifications for 18AM03: Maximum Discharge Flow Rate: 4.5 GALLONS PER MINUTE; Discharge Pressure: 2.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES. 2 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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