Vis à double filetage avec siège De Dietrich 721396300

A double screw with seat is a specialized fastener used in boiler and burner assemblies to secure components together. The integrated seat provides a stable surface for sealing, ensuring leak-free connections. This part is often found in gas burner systems where reliable fastening is critical. When servicing heating equipment, using the correct double screw with seat helps maintain system integrity and prevents loosening due to vibration or thermal expansion.