Art. 296S - Straight lockshield, female thread To be used with iron piping or, toghether with an Itap-Fit? Connector (art.618), with copper, crosslinked polyethylene (PEX) or polybutylene. In the case of use with PEX or polybutylene it is also requested the use of the liner art.655. Body in nickel-plated brass Maximum working temperature: 110 ° C Threads: ISO228 (equivalent to DIN EN ISO 228 and BS EN ISO 228) Suitable for thermostatic control heads art. 891 and art.891SD and for electrothermal actuator art.891M.