VDO Weld Boss designed for secure installation of pyrometer sensors where a fixed threaded mounting point is required. This weld-on boss provides a compact, robust mounting solution for monitoring exhaust gas temperatures or other high temperature locations on exhaust pipes, headers and manifolds. Its purpose is to give a sealed, threaded port for pyrometers and temperature sending units that accept a 1/4-18 NPTF connection.

The boss is manufactured for welding directly to metal tubing or castings and is intended for high temperature service when fitted correctly. It is supplied as the weld boss only so the temperature sensor or pyrometer is not included. Professional welding and correct sealing practices are recommended and fitment should be confirmed using the Parts Checker before purchase to ensure compatibility with your vehicle or application.

• Brand: VDO
• Type: Weld-on boss for pyrometer
• Thread size and type: 1/4-18 NPTF
• Intended use: Exhaust, headers, manifolds and other high temperature locations
• Construction: Heavy duty metal suitable for welding and high temperature environments
• Includes: Single weld boss only, sensor not included
• Installation: Weld-on; professional installation recommended
• Compatibility note: Fits pyrometers and sensors with 1/4-18 NPTF threads; use Parts Checker to confirm fitment