PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40176-108Valve,regulating,temperature

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-318-5431 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-318-5431 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-318-5431. Primary manufacturer part number: 40176-108.
Features
  • Valve,regulating,temperature — FSC 4820
  • Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
  • Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE STEM
  • Material: COPPER ALLOY SEAT
  • Material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE
  • Material: STEEL CORROSION RESISTING BODY
  • Material: STEEL CORROSION RESISTING STEM
  • Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE BODY
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Seat construction
General Description

The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-318-5431, 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 21 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-318-5431
Primary Part Number40176-108
Item NameValve,regulating,temperature
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Material Document and ClassificationQQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
Material Document and ClassificationQQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE STEM
MaterialCOPPER ALLOY SEAT
MaterialSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
MaterialSTEEL CORROSION RESISTING BODY
MaterialSTEEL CORROSION RESISTING STEM
Material Document and ClassificationQQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE BODY
First End Flange Outside Diameter6.125 INCHES NOMINAL IN
First End Connection TypeRECESSED FLANGE
First End Style DesignatorRECESSED
Flow Control DevicePISTON, SPRING LOADED
Face to Face Distance8.750 INCHES NOMINAL IN
Body StyleSTRAIGHT THRU
First End Flange Thickness0.531 INCHES NOMINAL IN
First End Recess Diameter2.750 INCHES NOMINAL IN
First End Bolt Hole Quantity6
First End Bolt Circle Diameter5.000 INCHES NOMINAL IN
Second End Relationship with First EndIDENTICAL
First End Flange Shape StyleROUND W/ BOLT HOLES
First End Bolt Hole Diameter0.562 INCHES NOMINAL IN
End Connection Quantity3
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2810-00-118-525140176 INTERCHANGEABLE
Screen Assembly,carburetor
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
9540-00-261-5145 INTERCHANGEABLE
Beam,structural
4730-00-289-3258182-221 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Dresser Industries Inc Leroi Div
9540-00-555-0815 INTERCHANGEABLE
Beam,structural
4820-01-091-286150199-02 INTERCHANGEABLE
Thermostatic Element,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
5975-01-097-4699 INTERCHANGEABLE
Panel,blank
4820-01-148-942340176-105 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-199-6652302-02 INTERCHANGEABLE
Packing Chamber,valves
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-203-894550158-03 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-217-999040176-109 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
40176 ASSY 40176-108 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40176-108 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40176 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
2810-00-118-5251INTERCHANGEABLE
SCREEN ASSEMBLY,CARBURETOR
40176
9540-00-261-5145INTERCHANGEABLE
BEAM,STRUCTURAL
4730-00-289-3258INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
182-221
9540-00-555-0815INTERCHANGEABLE
BEAM,STRUCTURAL
4820-01-091-2861INTERCHANGEABLE
THERMOSTATIC ELEMENT,VALVE
50199-02
5975-01-097-4699INTERCHANGEABLE
PANEL,BLANK
4820-01-148-9423INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40176-105
4820-01-199-6652INTERCHANGEABLE
PACKING CHAMBER,VALVES
302-02
4820-01-203-8945INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
50158-03
4820-01-217-9990INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40176-109
5342-01-285-3917INTERCHANGEABLE
CLAMP,CLOSURE
40176
4510-01-314-5012INTERCHANGEABLE
VALVE,WATER MIXING
40176-112

Frequently Asked Questions

What is NSN 4820-01-318-5431?

NSN 4820-01-318-5431 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 4820-01-318-5431?

NSN 4820-01-318-5431 has 3 cross-referenced part numbers: 40176 ASSY 40176-108 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40176-108 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40176 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-318-5431?

There are 12 known substitutes for 4820-01-318-5431: 2810-00-118-5251, 9540-00-261-5145, 4730-00-289-3258 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40176-108?

Key specifications for 40176-108: Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE; Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE STEM; Material: COPPER ALLOY SEAT; Material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE. 22 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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