These machined alloy take offs have a 3/8 BSP male thread and are designed to screw into the Revotec aluminium hose adaptor to convert them into a t piece.
Revotec Aluminium Hose Adaptor - 30mm Outer Diameter 1/8 NPT Take Off, Silver
Revotec Aluminium Hose Adaptor - 38mm Outer Diameter 3/8 BSP Take Off, Silver
Revotec Aluminium Hose Adaptor - 35mm, M12 x 1.5, Silver
Revotec Self Sealing Hose Take Offs - 10mm Male Barbed Outlet In Aluminium, Silver
Revotec Self Sealing Hose Take Offs - 8mm Male Barbed Outlet In Aluminium, Silver
Revotec Aluminium Hose Inserts - For 19mm Bore Hose 50mm Long, Silver