Zakrętka uszczelniająca 12x8.5x4mm De Dietrich S101144

The sealing cap 12x8.5x4mm is a small yet vital sealing component used in various boiler and burner assemblies to prevent leaks at connection points. With dimensions of 12mm outer diameter, 8.5mm inner diameter, and 4mm thickness, this cap provides a tight seal for ports or fittings. Whether you are repairing a gas burner or performing routine boiler maintenance, having the correct sealing cap ensures system integrity and safety. It is a common spare part in heating equipment repair kits.