UL Listed E42024 CSA Certified LR20812. JST part numbers Rxxx conform to JIS C2805. Uninsulated Crimp Ring Terminals, JST. A range of uninsulated crimp ring terminals from JST to suit stud sizes from 3 to 12mm and wire sizes from 0.2 to 10.5mm² (26 to 8 AWG). The terminals have butted seams and are made from tin-plated oxygen-free copper.