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Mike; I like that idea. I had considered a similar idea using a regular hex head nut, but the possibility of rotation of the nut under load turned me against it - the square nut is superior. Any ideas on how to shut off the transverse rectangular core against the head of the axial .312 core on...

Thanks for the link. Great info in Penn's pdf brochure! Dan

I agree. The price, at .30, is a challenge. Especially with my preference to avoid China. I do believe that a four family MUD type insert mold will meet my needs provided (i) I have the end user assemble the thing (give them three parts, a nut, and the two plastic halves) (ii) fully automatic...

Thanks Dinjin, True, the .377 section is a bit short for what I am doing. Acceptable for metal, but probably unacceptable for plastic. To address your question; overall part length is a concern for us, and the jacking screw has features on it which can not go into the threaded area. Jacking...

Thanks for the replies! I left quite a few unanswered questions in my original post. Thanks for bringing those to my attention. Function: The end device (product) is meant to install and extract a bearing from a from a plastic housing, by jacking with a metal, hand turned, 5/16-18 screw. So...

Greetings, I am seeking information on the strength of threads in various plastics. The image below shows my part. It shows a threaded zone: 5/16-18, the length of which is .377". It needs to withstand repeated, non-shock (gradually applied) loads in excess of 100 lbs in both directions...

Thanks for the comments! My original image above shows a molded/cast part with attendant draft and annular shelling to reduce cycle time and to reduce sinking. But for actual part function - we need the simple geometry shown below, which is more suitable for screw machine ops. Volume...

Greetings, Below is an image of a part I am designing for manufacture. My question for the group is, among Die cast, Injection Molding, and Screw machine, which method will yield the lowest part cost for this particular part? Considerations: --------------- (i) lot size: 5k to 50k (i) The...