Locknut Threads

segallyscott — Wed, 20 Jul 2022 18:59:51 GMT

I am currently drawing a locknut. The threads are 3.137-12. No matter what I do the threads do not work at the 3.137. It will model 2.933 threads but does not model anything higher. Is there something I'm missing?

This is the 2.993

This is the 3.137

It looks like it doesn't have a diameter and I cannot input one either. I made a 10 inch cylinder just to see if its the size of my locknut that's the problem but no matter what I do it won't model anything past 2.933.

Re: Locknut Threads

jhackney1972 — Wed, 20 Jul 2022 21:29:05 GMT

If you look at the Fusion 360 Thread database for AFBMA threads, it does not list any "internal" thread data for any sizes above the size 2.993 - 12 for an AN-15 lock nut. Follow this table, I have added the data, using the minimum sizes, to the thread data table. Below is the addition I made if you want it. If you add this data, remember you must restart Fusion 360 for it to take effect. The thread tables are located according to this webpage.

I have no idea why the internal thread data is omitted for sizes above AN-15 lock nuts.

topic Re: Locknut Threads in Fusion Support Forum

Locknut Threads

Re: Locknut Threads