The Parker screw
I saw a posting in the members only area about Parker screws for underlifters and I started to make this post there but I felt that I was about to steal that thread. So, I am starting a thread on the topic here.
Some of you may find this interesting?
This is an article I worked on years ago for Parker Pages. I learned a lot while digging up the information and the other thread sparked the idea to share it with this forum.
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