PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A50456-2A3Valve,radiator,heating

Federal Commercial Item Description Promulgated by General Services Administration Washington DC · NSN 4520-00-222-3477 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-00-222-3477 — this item is cataloged by the U.S. Government under National Stock Number 4520-00-222-3477. Primary manufacturer part number: A50456-2A3.
Features
  • Valve,radiator,heating — FSC 4520
  • Material: COPPER ALLOY 922 AND COPPER ALLOY 836 SEAT
  • Material: COPPER ALLOY STEM
  • Body Style: ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS
  • First End Style Designator: PLAIN
  • Flow Control Device: DISK, TOP GUIDED
  • End Connection Quantity: 2
  • Second End Connection Type: THREADED EXTERNAL PIPE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy 922 and Copper Alloy 836 Seat construction
General Description

The Valve,radiator,heating, cataloged under National Stock Number 4520-00-222-3477, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Federal Commercial Item Description Promulgated by General Services Administration Washington DC. Government technical data includes 18 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
NSN4520-00-222-3477
Primary Part NumberA50456-2A3
Item NameValve,radiator,heating
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerFederal Commercial Item Description Promulgated by General Services Administration Washington DC
StatusACTIVE
MaterialCOPPER ALLOY 922 AND COPPER ALLOY 836 SEAT
MaterialCOPPER ALLOY STEM
Body StyleANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS
First End Style DesignatorPLAIN
Flow Control DeviceDISK, TOP GUIDED
End Connection Quantity2
Second End Connection TypeTHREADED EXTERNAL PIPE
Second End Style DesignatorPLAIN
Operating Pressure100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Valve Operation MethodWHEEL
First End Connection TypeTHREADED INTERNAL PIPE
First End Thread DirectionRIGHT-HAND
Second End Relationship with First EndNOT IDENTICAL
Second End Nominal Pipe Size Accommodated1.000 INCHES IN
Second End Thread DirectionRIGHT-HAND
First End Nominal Pipe Size Accommodated1.000 INCHES IN
MaterialCOPPER ALLOY 922 AND COPPER ALLOY 836 BODY
Media for Which DesignedSTEAM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4520-00-204-0693 INTERCHANGEABLE
Valve,radiator,heating
4520-00-222-3475 INTERCHANGEABLE
Valve,radiator,heating
4520-00-222-3476 INTERCHANGEABLE
Valve,radiator,heating
4520-00-222-3478 INTERCHANGEABLE
Valve,radiator,heating
4520-00-222-3480A-A-50456 INTERCHANGEABLE
Valve,radiator,heating
Federal Commercial Item Description Promulgated by General Services Administration Washington DC
4520-00-222-3481 INTERCHANGEABLE
Valve,radiator,heating
4520-00-222-3482 INTERCHANGEABLE
Valve,radiator,heating
4520-00-222-3483 INTERCHANGEABLE
Valve,radiator,heating
4520-00-277-7504 INTERCHANGEABLE
Valve,radiator,heating
4520-00-540-4206 INTERCHANGEABLE
Valve,radiator,heating
Cross-Reference Index
Part NumberManufacturer
A50456-2A3 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
A-A-50456 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
WW-V-160 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
A-A-50456 PN2STASZ1IN. General Services Administration Federal Supply Service (USA)
Related Parts
4520-00-204-0693INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-222-3475INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-222-3476INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-222-3478INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-222-3480INTERCHANGEABLE
VALVE,RADIATOR,HEATING
A-A-50456
4520-00-222-3481INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-222-3482INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-222-3483INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-277-7504INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-540-4206INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-540-4214INTERCHANGEABLE
VALVE,RADIATOR,HEATING
4520-00-540-4215INTERCHANGEABLE
VALVE,RADIATOR,HEATING

Frequently Asked Questions

What is NSN 4520-00-222-3477?

NSN 4520-00-222-3477 is a Valve,radiator,heating, manufactured by Federal Commercial Item Description Promulgated by General Services Administration Washington DC, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-00-222-3477?

NSN 4520-00-222-3477 has 4 cross-referenced part numbers: A50456-2A3 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), A-A-50456 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), WW-V-160 (Federal Specifications Promulgated by General Services Administration Washington DC), A-A-50456 PN2STASZ1IN. (General Services Administration Federal Supply Service).

What NSN replaces 4520-00-222-3477?

There are 12 known substitutes for 4520-00-222-3477: 4520-00-204-0693, 4520-00-222-3475, 4520-00-222-3476 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A50456-2A3?

Key specifications for A50456-2A3: Material: COPPER ALLOY 922 AND COPPER ALLOY 836 SEAT; Material: COPPER ALLOY STEM; Special Features: CID A-A-50456 PATTERN 2,STYLE A,SIZE 1 IN. IN; Body Style: ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS. 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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