Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
(OP)
I'm designing a plate that needs to have holes tapped at 2-1/2" – 4 UNC, but I'm thinking of using inserts, does anyone know if this size exists?
Any response will be greatly appreciated!
Any response will be greatly appreciated!





RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
If my recall is any good I was told that above the 1 1/2" diameter they become ineffective and unworkable.
If possible could you post the reasoning behind your requirement for a Helicoil. Also the details of what you are attempting to accomplish.
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
Would it be possible to use pins and smaller fasteners to carry the tension load?
Again is it possible to use a set-in stud and nut?
A little more information would probably get more replies.
What is the plate material?
What is the fastener material and what is the desired preload on it?
Would it be possible to post a print or sketch?
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
A.R. "Andy" Nelson
Engineering Consultant
anelson@arnengineering.com
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
You might want to take a look at ring locked insert. This one is from ALCOA one of several manufacturers that have this type insert.
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RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
Signature: I'm Dutch and I'll do my best to write my English correctly
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
RE: Does a 2-1/2 û 4 UNC ôHelicoilö Exist?
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