Not sure if this belongs here but, it seemed right.
I had picked up some deep throat pipe clamps about a year ago because YCNHEC. I came across a reason to use them and so opened them up . . . no little spring-things for the ends of the pipe.
These are not a big deal but they keep the threads from getting buggered (in case you want to extend your pipes) and act as a stop if you're not paying attention (who, me?).
I figured, nothing ventured, nothing gained and so emailed ACC customer service and asked how much these little guys were. 3 days later a bag of them appeared in my mailbox.