PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12-50-303Pump Unit,rotary

Micropump Corp · NSN 4320-00-194-9956 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-194-9956 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-194-9956. Primary manufacturer part number: 12-50-303.
Features
  • Pump Unit,rotary — FSC 4320
  • Current Rating in Amps: 2.0
  • Current Type: AC
  • Maximum Discharge Flow Rate: 0.3 GALLONS PER MINUTE
  • Discharge Pressure: 0.0 COMPREHENSIVE PROCUREMENT GUIDELINE - VEHICULAR PRODUCTS - REBUILT VEHICULAR PARTS
  • Operating Speed at Rated Capacity: 3000.0 REVOLUTIONS PER MINUTE
  • Intake Connection Thread Size and Series/type Designator: 0.125-27 NPT
  • Current Rating in Amps: 2.0
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Pump Unit,rotary, cataloged under National Stock Number 4320-00-194-9956, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Micropump Corp. Government technical data includes 30 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-194-9956
Primary Part Number12-50-303
Item NamePump Unit,rotary
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerMicropump Corp
StatusACTIVE
Current Rating in Amps2.0
Current TypeAC
Maximum Discharge Flow Rate0.3 GALLONS PER MINUTE
Discharge Pressure0.0 COMPREHENSIVE PROCUREMENT GUIDELINE - VEHICULAR PRODUCTS - REBUILT VEHICULAR PARTS
Operating Speed at Rated Capacity3000.0 REVOLUTIONS PER MINUTE
Intake Connection Thread Size and Series/type Designator0.125-27 NPT
Current Rating in Amps2.0
Inclosure TypeOPEN
Pump Quantity1
Voltage in Volts115.0 AND 230.0
Prime Mover TypeELECTRIC MOTOR
Pumping Element Operating PositionHORIZONTAL
Rotary Pump DesignGEAR
Inclosure TypeOPEN
Discharge Connection Thread Size and Series/type Designator0.125-27 NPT
PhaseSINGLE
Cooling MethodSELF VENTILATED
Frequency in Hertz50.0 AND 60.0
Voltage in Volts115.0 AND 230.0
Discharge Connection Quantity1
Prime Mover Quantity1
Maximum Discharge Flow Rate0.3 GALLONS PER MINUTE
Environmental ProtectionDRIPPROOF
Discharge Connection TypeTHREADED INTERNAL
PhaseSINGLE
Frequency in Hertz50.0 AND 60.0
Prime Mover TypeELECTRIC MOTOR
Rotary Pump DesignGEAR
Operating Speed at Rated Capacity3000.0 REVOLUTIONS PER MINUTE
Intake Connection Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
1660-00-485-338980549 INTERCHANGEABLE
Flange-Refrigeratio
Honeywell International Inc. Div Aerospace - Torrance
5120-01-335-1044 INTERCHANGEABLE
Universal Joint,socket Wrench at
9515-01-500-289012-50303-12 INTERCHANGEABLE
Strip,metal
Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
5340-01-589-124712503-03 INTERCHANGEABLE
Bracket,mounting
Bae Systems Information & Electronic Systems Integration Inc.
Cross-Reference Index
Part NumberManufacturer
12-50-303 Micropump Corp (USA)
12A-50-303-80549 Micropump Corp (USA)
80549 Micropump Corp (USA)
Related Parts
1660-00-485-3389INTERCHANGEABLE
FLANGE-REFRIGERATIO
80549
5120-01-335-1044INTERCHANGEABLE
UNIVERSAL JOINT,SOCKET WRENCH AT
9515-01-500-2890INTERCHANGEABLE
STRIP,METAL
12-50303-12
5340-01-589-1247INTERCHANGEABLE
BRACKET,MOUNTING
12503-03

Frequently Asked Questions

What is NSN 4320-00-194-9956?

NSN 4320-00-194-9956 is a Pump Unit,rotary, manufactured by Micropump Corp, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-194-9956?

NSN 4320-00-194-9956 has 3 cross-referenced part numbers: 12-50-303 (Micropump Corp), 12A-50-303-80549 (Micropump Corp), 80549 (Micropump Corp).

What NSN replaces 4320-00-194-9956?

There are 4 known substitutes for 4320-00-194-9956: 1660-00-485-3389, 5120-01-335-1044, 9515-01-500-2890 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12-50-303?

Key specifications for 12-50-303: Current Rating in Amps: 2.0; Current Type: AC; Maximum Discharge Flow Rate: 0.3 GALLONS PER MINUTE; Discharge Pressure: 0.0 COMPREHENSIVE PROCUREMENT GUIDELINE - VEHICULAR PRODUCTS - REBUILT VEHICULAR PARTS. 30 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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