Lennox 18K18 (103623-05) Natural Gas Orifice delivers precise fuel metering for consistent burner performance in compatible Lennox furnace models. This #41 orifice features a 0.0960-inch diameter, 0.915-inch overall length, and 1/8-27 NPT threaded connection to ensure a secure, leak-resistant fit. Designed for standard natural gas applications, it maintains proper combustion efficiency and helps restore factory-specified operation during service or conversion.

Key Features
• Genuine Lennox 103623-05 natural gas orifice (#41 size)
• 0.0960-inch opening for accurate fuel flow regulation
• 0.915-inch OAL with 1/8-27 NPT threaded fitting
• Supports consistent ignition and stable burner performance
• Ideal for maintenance, replacements, and system tuning
• Manufactured for compatibility with select Lennox furnace units

Spesifications: