Coil Rod/Bolt/Nut Specifications

[sjmccart]

Hello,

I need to model a number of rods and fasteners using coil threads. Where can I find the specifications for these?

I did a search and could not find anything relevant.

Yes, I'm a newbie...

Thanks.

[Kelly Bramble]

Do you have a specification? Industry standard ?

[Hudson]

Find a copy of a book titled: "Machinery's Handbook" published by Industrial Press. The engineer guiding your modeling efforts should have specified the thread and should be able to help you find a copy of the book.

If there is no engineer on the project google "Kansas City skywalk" to see what can go wrong with threaded rods.

[sjmccart]

One of the threads is for a 3/4-4.5 bolt and nut. Thanks for the tip on the book. I was unaware it covered coil threads.

I am aware of the sidewalk failure. Very sad. Many failures by many hands...

Anyway, this is for concrete formwork.

Thank you for the help!

[sjmccart]

I have a copy of the 22nd edition of the handbook, and I was unable to locate the coil thread profile data. Can someone verify that the recent edition contains this information?

[Hudson]

Look for 'Unified Screw Threads".

[jboggs]

I'm not aware of any standard for so-called coil threads. When you say "coil threads", do you mean as in Helicoil type thread inserts? You can find their information on their website.

[sjmccart]

These are not HeliCoil inserts. There is nothing in the handbook specifying this thread profile under the UNC thread section, at least in the edition I have. Some examples:

http://www.buildsite.com/pdf/daytonr...ata-B35024.pdf
http://www.daytonsuperior.com/docs/default-source/tech-data-sheets/b14coilbolts_td.pdf?sfvrsn=10



Thanks.