PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-2Valve,cylinder,gas

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 8120-00-803-2172 · FSC 8120 · No Item Name Available
Verified by PartsTable
NSN 8120-00-803-2172 — this item is cataloged by the U.S. Government under National Stock Number 8120-00-803-2172. Primary manufacturer part number: MIL-DTL-2.
Features
  • Valve,cylinder,gas — FSC 8120
  • Second End Relationship with First End: NOT IDENTICAL
  • Special Markings: ACETYLENE
  • First End Thread Direction: RIGHT-HAND
  • Material: COPPER ALLOY 377 BODY
  • Material Document and Classification: QQ-B-626, ALLOY 377 FED SPEC SINGLE MATERIAL RESPONSE BODY
  • Nondefinitive Spec/std Data: V3-201-1 TYPE
  • Second End Connection Type: THREADED EXTERNAL GAS CYLINDER
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy 377 Body construction
General Description

The Valve,cylinder,gas, cataloged under National Stock Number 8120-00-803-2172, 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 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 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: Cancelled.

Technical Specifications
ParameterValue
NSN8120-00-803-2172
Primary Part NumberMIL-DTL-2
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
Second End Relationship with First EndNOT IDENTICAL
Special MarkingsACETYLENE
First End Thread DirectionRIGHT-HAND
MaterialCOPPER ALLOY 377 BODY
Material Document and ClassificationQQ-B-626, ALLOY 377 FED SPEC SINGLE MATERIAL RESPONSE BODY
Nondefinitive Spec/std DataV3-201-1 TYPE
Second End Connection TypeTHREADED EXTERNAL GAS CYLINDER
Second End Style DesignatorINVERTED FLARE
Second End Thread DirectionRIGHT-HAND
Media for Which DesignedACETYLENE
First End Thread Pitch Diameters+0.6120 TO 0.6479 INCHES IN
First End Connection TypeTHREADED EXTERNAL GAS CYLINDER
Operating Pressure600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Temp Rating70.0 FAHRENHEIT DEGF
Valve Operation MethodKEY OR WRENCH
End Connection Quantity2
Flow Control DeviceANY ACCEPTABLE
Body StyleY ANGLE
Second End Thread Pitch Diameters+0.5895 TO 0.5925 INCHES IN
First End Style DesignatorPLAIN
Furnished ItemsSAFETY DEVICE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
8120-00-142-9246 INTERCHANGEABLE
Valve,cylinder,gas
8120-00-216-6799 INTERCHANGEABLE
Cap,valve,gas Cylinder Outlet
8120-00-281-3798 INTERCHANGEABLE
Valve,cylinder,gas
8120-00-281-3799 INTERCHANGEABLE
Valve,cylinder,gas
8120-00-281-3802 INTERCHANGEABLE
Valve,cylinder,gas
8120-00-281-3805 INTERCHANGEABLE
Valve,cylinder,gas
8120-00-283-09251250C2 INTERCHANGEABLE
Valve,cylinder,gas
Superior Valve Co
8120-00-597-0888 INTERCHANGEABLE
Valve,cylinder,gas
8120-01-224-62041100-346B INTERCHANGEABLE
Valve,cylinder,gas
Superior Valve Co
8120-01-524-6760 INTERCHANGEABLE
Valve,cylinder,gas
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
A-A-59860 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
AV-MC-201M Harsco Corp Sherwood Div (USA)
A-A-59860-006 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
V3-200-1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-V-2/3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
8120-00-142-9246INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-00-216-6799INTERCHANGEABLE
CAP,VALVE,GAS CYLINDER OUTLET
8120-00-281-3798INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-00-281-3799INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-00-281-3802INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-00-281-3805INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-00-283-0925INTERCHANGEABLE
VALVE,CYLINDER,GAS
1250C2
8120-00-597-0888INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-01-224-6204INTERCHANGEABLE
VALVE,CYLINDER,GAS
1100-346B
8120-01-524-6760INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-01-524-6772INTERCHANGEABLE
VALVE,CYLINDER,GAS
8120-01-527-2850INTERCHANGEABLE
VALVE,CYLINDER,GAS

Frequently Asked Questions

What is NSN 8120-00-803-2172?

NSN 8120-00-803-2172 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 8120-00-803-2172?

NSN 8120-00-803-2172 has 6 cross-referenced part numbers: MIL-DTL-2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), A-A-59860 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), AV-MC-201M (Harsco Corp Sherwood Div), A-A-59860-006 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), V3-200-1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 8120-00-803-2172?

There are 12 known substitutes for 8120-00-803-2172: 8120-00-142-9246, 8120-00-216-6799, 8120-00-281-3798 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-2?

Key specifications for MIL-DTL-2: Second End Relationship with First End: NOT IDENTICAL; Special Markings: ACETYLENE; First End Thread Direction: RIGHT-HAND; Material: COPPER ALLOY 377 BODY. 21 total characteristics are documented in the Federal Logistics Information System.

Is NSN 8120-00-803-2172 still in active supply?

NSN 8120-00-803-2172 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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