This adaptor will connect 1/4"BSP Female to 1/8"BSP Male unions. Generally used to upsize 1/8"BSP Male Compressor outlets to fit 1/4"BSP Airbrush hoses.
We recommend the use of PTFE tape or Thread Locking Glue when using these adaptors to ensure a leak free joint.
1/8" BSP (British Standard Pipe) measures approx 9mm diameter.
1/4" BSP (British Standard Pipe) measures approx 12mm diameter.