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.

Interesting article Robin

Thanks for sharing
Allan

Screws
 

Very interesting Mr. Robin. Thank you for not only writing this also but bringing it to our attention. Cheers, Tom

Screw threads
 

Great paper, Just a note on 30 TPI etc. I do a lot of early antique car work and have found a lot of screw pitch that is between NC and NF. before 1915 about lots of screws were 10-24 or 1/4-24 for example rather than the 32 and 28 standard. Delco on their distributors used a 10-30 well into the late 1930's. you never quite now what you are going to find on early stuff.

Just some tidbits