Llave hexagonal 4mm 240 x 40 De Dietrich 7879687

A hex key 4mm 240 x 40 is an essential tool for servicing and assembling boiler and burner components. This L-shaped wrench is specifically sized for tightening or loosening hex socket screws commonly found in heating equipment. With a 4mm diameter and a length of 240mm, it offers good leverage for accessing fasteners in tight spaces. Whether you are performing routine maintenance or replacing parts, this tool ensures a secure fit and prevents damage to screw heads. It is a practical addition to any technician's toolkit, facilitating efficient work on gas burners and other heating system parts.