PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5561F4AValve,regulating,fluid Pressure

Tescom Corp Dba Tescom Div Tescom · NSN 4820-00-404-5866 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-404-5866 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-404-5866. Primary manufacturer part number: 5561F4A.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Renewable Seat Ring Type: THREADED
  • Temp Rating: -40.0 FAHRENHEIT MINIMUM AND 125.0 FAHRENHEIT MAXIMUM DEGF
  • Body Style: TEE
  • First End Style Designator: PLAIN
  • Furnished Items: AUTOMATIC RELIEF VALVE AND PRESSURE BREAKER
  • Media for Which Designed: AIR
  • First End Connection Type: THREADED INTERNAL PIPE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting and Plastic Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-404-5866, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Tescom Corp Dba Tescom Div Tescom. Government technical data includes 23 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-404-5866
Primary Part Number5561F4A
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTescom Corp Dba Tescom Div Tescom
StatusACTIVE
Renewable Seat Ring TypeTHREADED
Temp Rating-40.0 FAHRENHEIT MINIMUM AND 125.0 FAHRENHEIT MAXIMUM DEGF
Body StyleTEE
First End Style DesignatorPLAIN
Furnished ItemsAUTOMATIC RELIEF VALVE AND PRESSURE BREAKER
Media for Which DesignedAIR
First End Connection TypeTHREADED INTERNAL PIPE
Third End Relationship with Preceding EndsIDENTICAL WITH FIRST END
First End Thread DirectionRIGHT-HAND
Second End Relationship with First EndIDENTICAL
Flow Control DevicePOPPET
Manual Control MethodLEVER
FilterNOT INCLUDED
Outlet Pressure Range10.0 TO 3200.0 CAMERA MOUNT
Regulation Type1ST STAGE AUTOMATIC, 2ND STAGE MANUAL
MaterialSTEEL CORROSION RESISTING AND PLASTIC FLOW CONTROL DEVICE
Material Document and ClassificationUNABLE TO DECODE
Maximum Inlet Pressure RatingERR-060
Valve Stem DesignSINGLE SEAT
End Connection Quantity3
MaterialSTEEL CORROSION RESISTING SEAT
Thread Size and Series/type Designator1/4-18 NPT FIRST END
Valve Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4320-00-471-139465735 INTERCHANGEABLE
Rod,stroking,pump
Parker Hannifin Corporation Div Hydraulic Systems Division
3120-00-945-7099 INTERCHANGEABLE
Bearing,washer,thrust
5120-01-112-2860 INTERCHANGEABLE
Socket,socket Wrench
5210-01-642-587665735 INTERCHANGEABLE
Tape,measuring
U.s. Tape Company, Llc
Cross-Reference Index
Part NumberManufacturer
5561F4A PRIMARY Tescom Corp Dba Tescom Div Tescom (USA)
5561F4A Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA)
920A10 Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA)
65735 Davey Compressor Co Div of Keco Industries Inc (USA)
Related Parts
4320-00-471-1394INTERCHANGEABLE
ROD,STROKING,PUMP
65735
3120-00-945-7099INTERCHANGEABLE
BEARING,WASHER,THRUST
5120-01-112-2860INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5210-01-642-5876INTERCHANGEABLE
TAPE,MEASURING
65735

Frequently Asked Questions

What is NSN 4820-00-404-5866?

NSN 4820-00-404-5866 is a Valve,regulating,fluid Pressure, manufactured by Tescom Corp Dba Tescom Div Tescom, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-404-5866?

NSN 4820-00-404-5866 has 4 cross-referenced part numbers: 5561F4A (Tescom Corp Dba Tescom Div Tescom), 5561F4A (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 920A10 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 65735 (Davey Compressor Co Div of Keco Industries Inc).

What NSN replaces 4820-00-404-5866?

There are 4 known substitutes for 4820-00-404-5866: 4320-00-471-1394, 3120-00-945-7099, 5120-01-112-2860 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5561F4A?

Key specifications for 5561F4A: Renewable Seat Ring Type: THREADED; Temp Rating: -40.0 FAHRENHEIT MINIMUM AND 125.0 FAHRENHEIT MAXIMUM DEGF; Body Style: TEE; First End Style Designator: PLAIN. 24 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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