PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40055-4 PART 40055-408Valve,regulating,temperature

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-341-4266 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-341-4266 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-341-4266. Primary manufacturer part number: 40055-4 PART 40055-408.
Features
  • Valve,regulating,temperature — FSC 4820
  • Body Style: STRAIGHT THRU
  • Bulb Length: 12.000 INCHES NOMINAL IN
  • End Connection Quantity: 2
  • Thermostatic Element: FINNED
  • First End Nominal Pipe Size Accommodated: 2.000 INCHES IN
  • Material: COPPER ALLOY BODY
  • Flow Control Device: DISK, DUAL
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-341-4266, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-341-4266
Primary Part Number40055-4 PART 40055-408
Item NameValve,regulating,temperature
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Body StyleSTRAIGHT THRU
Bulb Length12.000 INCHES NOMINAL IN
End Connection Quantity2
Thermostatic ElementFINNED
First End Nominal Pipe Size Accommodated2.000 INCHES IN
MaterialCOPPER ALLOY BODY
Flow Control DeviceDISK, DUAL
Two-Way Valve ActionREVERSE ACTING
First End Style DesignatorSOCKET W/BRAZING RING
Second End Relationship with First EndIDENTICAL
First End Connection TypeUNTHREADED INTERNAL PIPE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5961-00-972-2893 INTERCHANGEABLE
Semiconductor Device,photo
5307-01-057-92875202-275 INTERCHANGEABLE
Stud,ball
Lucent Technologies Inc Corporate Headquarters
4820-01-397-7096 INTERCHANGEABLE
Valve,regulating,temperature
4820-01-423-198440055-412 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-424-987040055-411 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4920-01-494-0681400-554 INTERCHANGEABLE
Raf Tool Boom
Lockheed Martin Corporation Div Rotary and Mission Systems
4820-01-500-347940055-413 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
6685-01-686-951950146-28 INTERCHANGEABLE
Regulator,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-687-382340055-419 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
40055-4 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40055-4 PART 40055-408 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5961-00-972-2893INTERCHANGEABLE
SEMICONDUCTOR DEVICE,PHOTO
5307-01-057-9287INTERCHANGEABLE
STUD,BALL
5202-275
4820-01-397-7096INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
4820-01-423-1984INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40055-412
4820-01-424-9870INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40055-411
4920-01-494-0681INTERCHANGEABLE
RAF TOOL BOOM
400-554
4820-01-500-3479INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40055-413
6685-01-686-9519INTERCHANGEABLE
REGULATOR,TEMPERATURE
50146-28
4820-01-687-3823INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40055-419

Frequently Asked Questions

What is NSN 4820-01-341-4266?

NSN 4820-01-341-4266 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 4820-01-341-4266?

NSN 4820-01-341-4266 has 2 cross-referenced part numbers: 40055-4 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40055-4 PART 40055-408 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-341-4266?

There are 9 known substitutes for 4820-01-341-4266: 5961-00-972-2893, 5307-01-057-9287, 4820-01-397-7096 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40055-4 PART 40055-408?

Key specifications for 40055-4 PART 40055-408: Body Style: STRAIGHT THRU; Bulb Length: 12.000 INCHES NOMINAL IN; End Connection Quantity: 2; Thermostatic Element: FINNED. 11 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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