Review on Enhanced Safety Cap for Acetylene Cylinder Regulator Protector - 3-1/2 x 12, Fine Thread by Jeremy Jackz

I got this safety ring and tried to screw it onto my acetylene cylinder with thin threads and then found the threads were useless. Like they cut her twice at two different angles. Finally, after about an hour using a Dremel tool cutting my own threads and stripping off half the paint or powder coating, I barely got it working. I wouldn't recommend buying this one because it was the cheapest, same as me. Come on, pay more and get a good one.