Thread-on nut secures cable to helm
Conical nut holds spent travel tube
The Big-T Helm features a large thread-on nut that secures cable to the helm. Conical plastic nut holds spent travel tube. Usually has diecast bezel which can be either round, one-piece, or oval two-piece design. Older systems may have two helms (twin station) or 2-3 cables (tension) system.