Safety coupling with cylindrical internal thread and push-button system; automatic pressure relief for safe separation without the dreaded "whip effect" when removing the nipple; pressing the button provides instant pressure relief in the pipe and the nipple is separated in one process; meets ISO 4414 standards to protect the user; certified according to ATEX 2; European 7.2 real profile 77.4 mm; universal application; anti-static; ergonomic design and ultra-light