This is the cable for my Sennheiser headphones. does is have a particular name??? Mine isn't working properly and I've been trying so hard to find a new one to buy but nothing comes up in my country with just searching for it. I don't know what the thinner part is called.
Not all of them have the twist and lock, I had a pair of pxc 550 that came with the 2.5 to 3.5 that didn't have the locking groove and when I wanted to use that cable on a pair of HD450BT I had to cut into the cable to make it fit, another way to make a non proprietary cable fit is to snap the little nub that locks the cable in place