Special screws for 6-32 heliciol insert tapped hole

[RJT]

I'm quoting some parts that will have tapped holes for a 6-32 heliciol insert (before the insert is installed) that I need to use to fixture on. Does a screw exist that would have the diameter and pitch of the OD of the insert so I can use it to fasten the parts to my fixture? I could make them, but if they exist, why bother. I can't put the inserts in until after plating, so that isn't an option.

 

[rklopp]

Could you loctite an insert to a regular 6-32 screw.

 

[RJT]

Good idea. Not sure how free the insert would then thread into the hole. It's worth a try.

 

[dandrummerman21]

Any chance the holes are thru? because if they are, you could leave the tang on to drive them thru the hole after using them.

 

[Larry Dickman]

Good idea. Not sure how free the insert would then thread into the hole. It's worth a try.

no it's not
I used to make my own special screws. What a pita
here's what I've been doing lately, and it works great. Get some 6-32 timeserts. you need to grind the head off, which is easy to do if you screw it onto a shoulder bolt.
Then, attach it to a 6-32 bolt with some red locktite.

 

[RJT]

Not through holes.
Are the OD of timeserts the same as a Helciol? Meaning the tapped hole is identical?

 

[John Garner]

RJT --

Yes, the standard-issue Timesert inserts fit holes tapped with standard-issue STI taps of the same standard size.

More explicitly, a standard number 6-32 Timesert will fit a hole tapped with a number 6-32 STI tap.

 

[RJT]

Problem solved, thanks all.

 

[jim rozen]

What's the difference between an 8-32 screw and the helicoil tap?

 

[Larry Dickman]

What's the difference between an 8-32 screw and the helicoil tap?

it's about .005 too big.

 

[Larry Dickman]

it's about .005 too big.

oops, 10-32 is too big. 8-32 is about .020 under, i think it would be pretty easy to strip them
i use 6-40 bolts in 4-40 sti holes. It works well, screw pitch is about .010 under and i think you could strip them if not careful.