Aluminum adapter piece; Male quick coupler to 1/8" BSP threading. Not to be confused with nor treated as stainless steel.
Useful in some applications, for example, to connect two 300 BAR hoses, etc
We recommend using PTFE / thread tape, esp. the heavier duty sort for >160 BAR applications, as merely tool-tightening this bit, will not prevent air escaping in excess of 160 BAR. For smaller applications, thread tape is generally not considered necessary, if just using for filling purposes.