PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

04X35Valve,regulating,fluid Pressure

Union Carbide Corp Sub of Dow Co the · NSN 4820-00-664-6655 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-664-6655 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-664-6655. Primary manufacturer part number: 04X35.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Body Style: ANGLE
  • Thread Size and Series/type Designator: 5/8-18 UNF FIRST END
  • Media for Which Designed: ARGON AND HELIUM AND NITROGEN, GASEOUS
  • Material: COPPER ALLOY FLOW CONTROL DEVICE
  • Thread Size and Series/type Designator: 0.960-14 NGO SECOND END
  • Furnished Items: FLOWMETER AND INLET PRESSURE GAGE
  • First End Style Designator: HIGH PRESSURE FLARE (USED WITH MALE THREADED STYLE NO. 39)
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-664-6655, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Union Carbide Corp Sub of Dow Co the. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 6 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
NSN4820-00-664-6655
Primary Part Number04X35
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerUnion Carbide Corp Sub of Dow Co the
StatusCANCELLED
Body StyleANGLE
Thread Size and Series/type Designator5/8-18 UNF FIRST END
Media for Which DesignedARGON AND HELIUM AND NITROGEN, GASEOUS
MaterialCOPPER ALLOY FLOW CONTROL DEVICE
Thread Size and Series/type Designator0.960-14 NGO SECOND END
Furnished ItemsFLOWMETER AND INLET PRESSURE GAGE
First End Style DesignatorHIGH PRESSURE FLARE (USED WITH MALE THREADED STYLE NO. 39)
First End Connection TypeTHREADED INTERNAL TUBE
First End Thread DirectionRIGHT-HAND
Temp Rating-40.0 FAHRENHEIT MINIMUM AND 165.0 FAHRENHEIT MAXIMUM DEGF
Flow Control DeviceNEEDLE
Outlet Pressure SettingERR-060
MaterialALUMINUM ALLOY BODY
Regulation Type1ST STAGE AUTOMATIC, 2ND STAGE MANUAL
FilterINCLUDED
Second End Connection TypeTHREADED EXTERNAL GAS CYLINDER
End Connection Quantity2
Second End Style DesignatorSWIVEL NUT, FLARED
Second End Thread DirectionRIGHT-HAND
Second End Relationship with First EndNOT IDENTICAL
First End Thread Class2B
Valve Loading MethodSPRING
First End Outside Diameter Tube Accommodated0.375 INCHES NOMINAL IN
Manual Control MethodKNOB
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5120-00-032-6171R503 INTERCHANGEABLE
Socket,socket Wrench
Hiller Aircraft Corporation
3110-00-159-9283ART2034A INTERCHANGEABLE
Bearing,ball,annular
Schatz Bearing Corporation Dba Schatz Bearing Corp
4730-00-289-1739CR226-5 INTERCHANGEABLE
Sleeve,compression,tube-Hose Fit
Curtis-Toledo, Inc.
5977-00-337-81121906945 INTERCHANGEABLE
Brush,electrical Contact
Delco Remy America Inc
6610-00-343-5618R5-2 INTERCHANGEABLE
Coupling
Kearfott Corporation Div Guidance and Navigation Division
5950-00-387-0498 INTERCHANGEABLE
Coil,radio Frequency
5330-00-872-6428 INTERCHANGEABLE
Seal,oil
3455-01-044-6358 INTERCHANGEABLE
Cutter,milling,end
6230-01-102-6534PR-125T/B INTERCHANGEABLE
Light,extension
Spectronics Corporation
5120-01-109-7631 INTERCHANGEABLE
Socket,socket Wrench
Cross-Reference Index
Part NumberManufacturer
04X35 Union Carbide Corp Sub of Dow Co the (USA)
HVTS2537-580 Victor Equipment Co (USA)
WP4-0745-23 Welding Process Inc (USA)
04X34 Union Carbide Corp Sub of Dow Co the (USA)
998846 L-Tec Welding and Cutting Systems (USA)
998846 Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng (USA)
R502 L-Tec Welding and Cutting Systems (USA)
R502 Union Carbide Corp Sub of Dow Co the (USA)
03X90 L-Tec Welding and Cutting Systems (USA)
0781-3772 Victor Equipment Co (USA)
04X35 L-Tec Welding and Cutting Systems (USA)
R52 Los Angeles Resistor Co (USA)
R503 Union Carbide Corp Sub of Dow Co the (USA)
639296 Union Carbide Corp Sub of Dow Co the (USA)
Related Parts
5120-00-032-6171INTERCHANGEABLE
SOCKET,SOCKET WRENCH
R503
3110-00-159-9283INTERCHANGEABLE
BEARING,BALL,ANNULAR
ART2034A
4730-00-289-1739INTERCHANGEABLE
SLEEVE,COMPRESSION,TUBE-HOSE FIT
CR226-5
5977-00-337-8112INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
1906945
6610-00-343-5618INTERCHANGEABLE
COUPLING
R5-2
5950-00-387-0498INTERCHANGEABLE
COIL,RADIO FREQUENCY
5330-00-872-6428INTERCHANGEABLE
SEAL,OIL
3455-01-044-6358INTERCHANGEABLE
CUTTER,MILLING,END
6230-01-102-6534INTERCHANGEABLE
LIGHT,EXTENSION
PR-125T/B
5120-01-109-7631INTERCHANGEABLE
SOCKET,SOCKET WRENCH
4820-01-120-7213INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
R-502
3510-01-148-4660INTERCHANGEABLE
GUIDE,LINT,SCREEN

Frequently Asked Questions

What is NSN 4820-00-664-6655?

NSN 4820-00-664-6655 is a Valve,regulating,fluid Pressure, manufactured by Union Carbide Corp Sub of Dow Co the, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-664-6655?

NSN 4820-00-664-6655 has 14 cross-referenced part numbers: 04X35 (Union Carbide Corp Sub of Dow Co the), HVTS2537-580 (Victor Equipment Co), WP4-0745-23 (Welding Process Inc), 04X34 (Union Carbide Corp Sub of Dow Co the), 998846 (L-Tec Welding and Cutting Systems) and 9 more.

What NSN replaces 4820-00-664-6655?

There are 12 known substitutes for 4820-00-664-6655: 5120-00-032-6171, 3110-00-159-9283, 4730-00-289-1739 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 04X35?

Key specifications for 04X35: Body Style: ANGLE; Thread Size and Series/type Designator: 5/8-18 UNF FIRST END; Media for Which Designed: ARGON AND HELIUM AND NITROGEN, GASEOUS; Material: COPPER ALLOY FLOW CONTROL DEVICE. 24 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-664-6655 still in active supply?

NSN 4820-00-664-6655 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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