PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40425-803Valve,regulating,temperature

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-424-2675 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-424-2675 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-424-2675. Primary manufacturer part number: 40425-803.
Features
  • Valve,regulating,temperature — FSC 4820
  • First End Style Designator: SOCKET W/BRAZING RING
  • Flow Control Device: BELLOWS
  • Temp Adjustability: ADJUSTABLE
  • First End Connection Type: UNTHREADED INTERNAL PIPE
  • Material: STEEL CORROSION RESISTING SEAT
  • Body Style: STRAIGHT THRU
  • Bulb Length: 12.000 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Seat construction
General Description

The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-424-2675, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-424-2675
Primary Part Number40425-803
Item NameValve,regulating,temperature
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
First End Style DesignatorSOCKET W/BRAZING RING
Flow Control DeviceBELLOWS
Temp AdjustabilityADJUSTABLE
First End Connection TypeUNTHREADED INTERNAL PIPE
MaterialSTEEL CORROSION RESISTING SEAT
Body StyleSTRAIGHT THRU
Bulb Length12.000 INCHES NOMINAL IN
End Connection Quantity2
MaterialSTEEL CORROSION RESISTING STEM
Temp Rating60.0 FAHRENHEIT MINIMUM AND 90.0 FAHRENHEIT MAXIMUM DEGF
Bulb Diameter0.125 INCHES NOMINAL IN
MaterialCOPPER ALLOY BULB
First End Nominal Pipe Size Accommodated2.000 INCHES IN
Thermostatic ElementLIQUID IMMERSION TYPE
Second End Relationship with First EndIDENTICAL
MaterialCOPPER ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5950-00-483-0215662-0363-010 INTERCHANGEABLE
Transformer,power
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5910-00-617-526240425 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Hanovia Specialty Lighting Llc
5315-00-680-8599 INTERCHANGEABLE
Pin,straight,headless
5962-01-078-574240425 INTERCHANGEABLE
Microcircuit,memory
Raytheon Company Div Rmd Strategic
4820-01-151-3733 INTERCHANGEABLE
Seat,valve
4820-01-151-4466 INTERCHANGEABLE
Valve,regulating,temperature
3040-01-234-350440425-1167 INTERCHANGEABLE
Gearshaft,helical
Timken Gears & Services Inc. Div Philadelphia Gear
Cross-Reference Index
Part NumberManufacturer
40425 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40425-803 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40425-8 ASSEMBLY 40425-803 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5950-00-483-0215INTERCHANGEABLE
TRANSFORMER,POWER
662-0363-010
5910-00-617-5262INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
40425
5315-00-680-8599INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
5962-01-078-5742INTERCHANGEABLE
MICROCIRCUIT,MEMORY
40425
4820-01-151-3733INTERCHANGEABLE
SEAT,VALVE
4820-01-151-4466INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
3040-01-234-3504INTERCHANGEABLE
GEARSHAFT,HELICAL
40425-1167

Frequently Asked Questions

What is NSN 4820-01-424-2675?

NSN 4820-01-424-2675 is a Valve,regulating,temperature, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-424-2675?

NSN 4820-01-424-2675 has 3 cross-referenced part numbers: 40425 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40425-803 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40425-8 ASSEMBLY 40425-803 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-424-2675?

There are 7 known substitutes for 4820-01-424-2675: 5950-00-483-0215, 5910-00-617-5262, 5315-00-680-8599 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40425-803?

Key specifications for 40425-803: First End Style Designator: SOCKET W/BRAZING RING; Flow Control Device: BELLOWS; Temp Adjustability: ADJUSTABLE; First End Connection Type: UNTHREADED INTERNAL PIPE. 16 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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