PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILV9439Valve,cylinder,gas

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 8120-00-525-4090 · FSC 8120 · No Item Name Available
Verified by PartsTable
NSN 8120-00-525-4090 — this item is cataloged by the U.S. Government under National Stock Number 8120-00-525-4090. Primary manufacturer part number: MILV9439.
Features
  • Valve,cylinder,gas — FSC 8120
  • Operating Pressure: 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Second End Relationship with First End: NOT IDENTICAL
  • First End Nominal Pipe Size Accommodated: 1.000 INCHES IN
  • End Connection Quantity: 2
  • Valve Operation Method: WHEEL
  • First End Style Designator: PLAIN
  • Second End Connection Type: THREADED EXTERNAL PIPE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,cylinder,gas, cataloged under National Stock Number 8120-00-525-4090, is classified within Federal Supply Class 8120 (No Item Name Available) of the Containers, Packaging, and Packing Supplies group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN8120-00-525-4090
Primary Part NumberMILV9439
Item NameValve,cylinder,gas
FSC / FSG8120 / 81 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Operating Pressure5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Second End Relationship with First EndNOT IDENTICAL
First End Nominal Pipe Size Accommodated1.000 INCHES IN
End Connection Quantity2
Valve Operation MethodWHEEL
First End Style DesignatorPLAIN
Second End Connection TypeTHREADED EXTERNAL PIPE
Media for Which DesignedOXYGEN, LIQUID
Second End Nominal Pipe Size Accommodated1.000 INCHES IN
Body StyleANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS
Second End Thread DirectionRIGHT-HAND
First End Connection TypeTHREADED EXTERNAL PIPE
Second End Style DesignatorFLARED
Furnished ItemsSAFETY DEVICE AND SIPHON TUBE
Special MarkingsOPEN AND A DIRECTIONAL ARROW ON HANDWHEEL
Flow Control DeviceDIAPHRAGM
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
4820-00-528-3491 INTERCHANGEABLE
Valve,globe
8120-00-794-59845500 INTERCHANGEABLE
Valve,cylinder,gas
Fluid Power, Inc.
Cross-Reference Index
Part NumberManufacturer
MILV9439 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-9439 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4820-00-528-3491INTERCHANGEABLE
VALVE,GLOBE
8120-00-794-5984INTERCHANGEABLE
VALVE,CYLINDER,GAS
5500

Frequently Asked Questions

What is NSN 8120-00-525-4090?

NSN 8120-00-525-4090 is a Valve,cylinder,gas, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 8120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 8120-00-525-4090?

NSN 8120-00-525-4090 has 2 cross-referenced part numbers: MILV9439 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-9439 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 8120-00-525-4090?

There are 2 known substitutes for 8120-00-525-4090: 4820-00-528-3491, 8120-00-794-5984. Verify interchangeability with system specifications before substitution.

What are the specifications of MILV9439?

Key specifications for MILV9439: Operating Pressure: 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Second End Relationship with First End: NOT IDENTICAL; First End Nominal Pipe Size Accommodated: 1.000 INCHES IN; End Connection Quantity: 2. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 8120-00-525-4090 still in active supply?

NSN 8120-00-525-4090 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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