PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

UL 252-TYPE-3Valve,regulating,fluid Pressure

American National Standards Institute Incorporated Dba American National Standards Institute · NSN 4820-00-641-3519 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-641-3519 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-641-3519. Primary manufacturer part number: UL 252-TYPE-3.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Valve Stem Design: DOUBLE SEATDOUBLE SEAT
  • Thread Size and Series/type Designator: 0.563-18 UNF FIRST END0.563-18 UNF FIRST END
  • Second End Style Designator: PLAINPLAIN
  • First End Style Designator: FLAREDFLARED
  • First End Connection Type: THREADED EXTERNAL TUBETHREADED EXTERNAL TUBE
  • First End Thread Direction: RIGHT-HANDRIGHT-HAND
  • Nondefinitive Spec/std Data: 3 TYPE3 TYPE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-641-3519, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is American National Standards Institute Incorporated Dba American National Standards Institute. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-641-3519
Primary Part NumberUL 252-TYPE-3
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAmerican National Standards Institute Incorporated Dba American National Standards Institute
StatusCANCELLED
Valve Stem DesignDOUBLE SEATDOUBLE SEAT
Thread Size and Series/type Designator0.563-18 UNF FIRST END0.563-18 UNF FIRST END
Second End Style DesignatorPLAINPLAIN
First End Style DesignatorFLAREDFLARED
First End Connection TypeTHREADED EXTERNAL TUBETHREADED EXTERNAL TUBE
First End Thread DirectionRIGHT-HANDRIGHT-HAND
Nondefinitive Spec/std Data3 TYPE3 TYPE
Thread Size and Series/type Designator0.563-18 NPT SECOND END0.563-18 NPT SECOND END
Body StyleANGLEANGLE
First End Outside Diameter Tube Accommodated0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN
Second End Relationship with First EndNOT IDENTICALNOT IDENTICAL
Outlet Pressure Range0.0 TO 120.0 CAMERA MOUNT
Regulation Type1ST STAGE AUTOMATIC, 2ND STAGE MANUAL1ST STAGE AUTOMATIC, 2ND STAGE MANUAL
FilterNOT INCLUDEDNOT INCLUDED
Valve Loading MethodSPRINGSPRING
Maximum Inlet Pressure RatingERR-060
Second End Connection TypeTHREADED INTERNAL PIPETHREADED INTERNAL PIPE
Manual Control MethodKNOBKNOB
Outlet Pressure Accuracy RatingERR-060
Flow Control DeviceDIAPHRAGMDIAPHRAGM
Second End Thread DirectionRIGHT-HANDRIGHT-HAND
First End Thread Class3A3A
Media for Which DesignedOXYGEN, GASEOUSOXYGEN, GASEOUS
End Connection Quantity22
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
4820-00-007-4596RV8011-1 INTERCHANGEABLE
Regulator,compressed Gas
Uniweld Products, Inc. Dba Uniweld Products Inc
4820-00-551-1094UL252-TYPE-1 INTERCHANGEABLE
Valve,regulating,fluid Pressure
American National Standards Institute Incorporated Dba American National Standards Institute
4820-01-194-93240781-0043 INTERCHANGEABLE
Regulator,compressed Gas
Victor Equipment Co
Cross-Reference Index
Part NumberManufacturer
03X05 Union Carbide Corp Sub of Dow Co the (USA)
A-A-55540 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
MILR13877 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
UL 252 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
R64-03X05 Union Carbide Corp Linde Div
UL 252-TYPE-3 PRIMARY American National Standards Institute Incorporated Dba American National Standards Institute (USA)
03X05 L-Tec Welding and Cutting Systems (USA)
Related Parts
4820-00-007-4596INTERCHANGEABLE
REGULATOR,COMPRESSED GAS
RV8011-1
4820-00-551-1094INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
UL252-TYPE-1
4820-01-194-9324INTERCHANGEABLE
REGULATOR,COMPRESSED GAS
0781-0043

Frequently Asked Questions

What is NSN 4820-00-641-3519?

NSN 4820-00-641-3519 is a Valve,regulating,fluid Pressure, manufactured by American National Standards Institute Incorporated Dba American National Standards Institute, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-641-3519?

NSN 4820-00-641-3519 has 7 cross-referenced part numbers: 03X05 (Union Carbide Corp Sub of Dow Co the), A-A-55540 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), MILR13877 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), UL 252 (American National Standards Institute Incorporated Dba American National Standards Institute), R64-03X05 (Union Carbide Corp Linde Div) and 2 more.

What NSN replaces 4820-00-641-3519?

There are 3 known substitutes for 4820-00-641-3519: 4820-00-007-4596, 4820-00-551-1094, 4820-01-194-9324. Verify interchangeability with system specifications before substitution.

What are the specifications of UL 252-TYPE-3?

Key specifications for UL 252-TYPE-3: Valve Stem Design: DOUBLE SEATDOUBLE SEAT; Thread Size and Series/type Designator: 0.563-18 UNF FIRST END0.563-18 UNF FIRST END; Second End Style Designator: PLAINPLAIN; First End Style Designator: FLAREDFLARED. 24 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-641-3519 still in active supply?

NSN 4820-00-641-3519 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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