Robertshaw Thermocouple – 446-511 | 28" Length | Fine Thread | NG/LP Compatible | OEM Replacement

Ensure dependable ignition performance in your gas or wood fireplace with the Robertshaw 446-511 Thermocouple. This 28-inch OEM replacement is engineered for compatibility with a wide range of Hearth & Home Technologies (HHT) brands, including Heat N Glo, Heatilator, Quadra-Fire, and Majestic. Built for natural gas (NG) and propane (LP) systems, it delivers precise flame sensing and durable performance under high-heat conditions.

🔥 Key Features:
✅ OEM part number: 446-511
✅ 28" copper lead for flexible installations
✅ Fine thread connection for secure fitment
✅ Compatible with NG and LP fuel types
✅ Designed for fireplaces, gas stoves, and wood-burning systems
✅ Fits many Heat N Glo, Heatilator, Quadra-Fire, and Majestic models
✅ Rugged construction to withstand heat and the elements
✅ OEM-quality performance for HHT components
✅ Made in the USA

📐 Specifications:

• Part Number: 446-511

• Brand: Robertshaw

• Lead Length: 28 inches

• Thread Type: Fine thread

• Fuel Compatibility: Natural Gas (NG) / Liquid Propane (LP)

• Compatible Brands: Heat N Glo, Heatilator, Quadra-Fire, Majestic

• Application: Fireplaces, wood/gas stoves, furnaces

• Country of Origin: USA

• System Type: Millivolt

🛠️ Installation Tip:
Ensure the thermocouple tip is positioned directly in the pilot flame and securely threaded into the valve port. Avoid overtightening to preserve thread integrity and optimal conductivity.

🔍 Fit Confirmation:
This part is widely used across HHT product lines. Confirm your original part number or reference your appliance’s manual to verify proper compatibility before purchasing. Installed parts are not eligible for return unless defective.