Curved Bars and Belly Bars - Internal Thread
Internally threaded curved bars that measure 1.2mm and 1.6mm gauge externally. These bars accept externally threaded attachments appropriate to their gauge. For information, externally threaded attachments for 1.6mm shafts have 1.2mm threads. Externally threaded attachments for 1.2mm shafts have 0.9mm threads.