Inserted Threading Bar for 3/4-8 Multi Start Acme

[Vulcan R&D]

I need a inserted threading bar for to make a 3/4-8 4 start acme thread on an ID. Any suggestions. I just found out the Sandvik tool I was looking at would be fine for 3/4-8 but not a 3/4-8 4 start. Thanks for your help!

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