PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

991Pump,rotary

Oberdorfer Foundries Inc · NSN 4320-00-192-9321 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-192-9321 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-192-9321. Primary manufacturer part number: 991.
Features
  • Pump,rotary — FSC 4320
  • Maximum Discharge Flow Rate: 1.8 GALLONS PER MINUTE
  • Discharge Connection Thread Size and Series/type Designator: 0.250-18 NPT
  • Operating Speed at Rated Capacity: 1725.0 REVOLUTIONS PER MINUTE
  • Pump Rotation Direction: CLOCKWISE AND COUNTERCLOCKWISE
  • Intake Connection Type: THREADED INTERNAL
  • Pump Rotation Direction: CLOCKWISE AND COUNTERCLOCKWISE
  • Discharge Connection Type: THREADED INTERNAL
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Pump,rotary, cataloged under National Stock Number 4320-00-192-9321, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Oberdorfer Foundries Inc. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN4320-00-192-9321
Primary Part Number991
Item NamePump,rotary
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerOberdorfer Foundries Inc
StatusACTIVE
Maximum Discharge Flow Rate1.8 GALLONS PER MINUTE
Discharge Connection Thread Size and Series/type Designator0.250-18 NPT
Operating Speed at Rated Capacity1725.0 REVOLUTIONS PER MINUTE
Pump Rotation DirectionCLOCKWISE AND COUNTERCLOCKWISE
Intake Connection TypeTHREADED INTERNAL
Pump Rotation DirectionCLOCKWISE AND COUNTERCLOCKWISE
Discharge Connection TypeTHREADED INTERNAL
Operating Speed at Rated Capacity1725.0 REVOLUTIONS PER MINUTE
Rotary Pump DesignGEAR
Media for Which DesignedWATER, FRESH
Discharge Connection Quantity1
Pumping Element Operating PositionHORIZONTAL
Rotary Pump DesignGEAR
Discharge Pressure0.0 WATER CONSERVING - WATER SAVING TECHNOLOGIES - LOW-FLOW PRE-RINSE SPRAY VALVES
Operation MethodPOWERED
Intake Connection Quantity1
Intake Connection Thread Size and Series/type Designator0.250-18 NPT
Drive Connection TypeCLOSE COUPLED
Operation MethodPOWERED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5120-00-056-3935 INTERCHANGEABLE
Handle,screwdriver
5133-00-239-0782 INTERCHANGEABLE
Countersink
5940-00-245-5930991 INTERCHANGEABLE
Terminal,lug
Brainin-Advance Industries, Llc
5133-00-255-4065805794 INTERCHANGEABLE
Countersink
Curtiss-Wright Controls, Inc. Div Actuation Division
4730-00-299-0962H4320-299-0962 INTERCHANGEABLE
Nozzle,spray,fluid-Emulsion
Naval Inventory Control Point Mechanicsburg
5930-00-321-5373 INTERCHANGEABLE
Switch,double Tumbl
5950-00-462-0395 INTERCHANGEABLE
Coil,electrical
5120-00-516-4220991 INTERCHANGEABLE
Fishing Tool,pneumatic Tire Valv
Schrader-Bridgeport International Inc Dba Schrader Automotive
5961-00-518-4499 INTERCHANGEABLE
Semiconductor Device,diode
5970-00-539-6847 INTERCHANGEABLE
Tape,insulation,electrical
Cross-Reference Index
Part NumberManufacturer
1-1-2CCC991-10 Oberdorfer Foundries Inc (USA)
2310-1602 Airco Welding Products Div of Boc Group Inc Cutting Machine Dept (USA)
991 PRIMARY Oberdorfer Foundries Inc (USA)
991 All Pumps Sales & Service (AUS)
Related Parts
5120-00-056-3935INTERCHANGEABLE
HANDLE,SCREWDRIVER
5133-00-239-0782INTERCHANGEABLE
COUNTERSINK
5940-00-245-5930INTERCHANGEABLE
TERMINAL,LUG
991
5133-00-255-4065INTERCHANGEABLE
COUNTERSINK
805794
4730-00-299-0962INTERCHANGEABLE
NOZZLE,SPRAY,FLUID-EMULSION
H4320-299-0962
5930-00-321-5373INTERCHANGEABLE
SWITCH,DOUBLE TUMBL
5950-00-462-0395INTERCHANGEABLE
COIL,ELECTRICAL
5120-00-516-4220INTERCHANGEABLE
FISHING TOOL,PNEUMATIC TIRE VALV
991
5961-00-518-4499INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5970-00-539-6847INTERCHANGEABLE
TAPE,INSULATION,ELECTRICAL
5330-00-773-3704INTERCHANGEABLE
PACKING WITH RETAINER
734908-1
5975-00-816-9617INTERCHANGEABLE
BUSHING,ELECTRICAL CONDUIT
991

Frequently Asked Questions

What is NSN 4320-00-192-9321?

NSN 4320-00-192-9321 is a Pump,rotary, manufactured by Oberdorfer Foundries Inc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-192-9321?

NSN 4320-00-192-9321 has 4 cross-referenced part numbers: 1-1-2CCC991-10 (Oberdorfer Foundries Inc), 2310-1602 (Airco Welding Products Div of Boc Group Inc Cutting Machine Dept), 991 (Oberdorfer Foundries Inc), 991 (All Pumps Sales & Service).

What NSN replaces 4320-00-192-9321?

There are 12 known substitutes for 4320-00-192-9321: 5120-00-056-3935, 5133-00-239-0782, 5940-00-245-5930 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 991?

Key specifications for 991: Maximum Discharge Flow Rate: 1.8 GALLONS PER MINUTE; Discharge Connection Thread Size and Series/type Designator: 0.250-18 NPT; Operating Speed at Rated Capacity: 1725.0 REVOLUTIONS PER MINUTE; Pump Rotation Direction: CLOCKWISE AND COUNTERCLOCKWISE. 19 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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