Can anyone recommend source for miniature, (2-56), threaded dowel pin?

gmoushon · May 31, 2019

Looking for a US-based source for small threaded dowel pins. Ideal would be a 3/32 pin, OAL 0.625 which would include ~0.125 of the end threaded to 2-56 and the opposite end slotted.

Worst case I could buy shouldered screws from McMaster and turn the head down but they want $3.00-$4.00 each which seems high to me, not to mention the machining time.

Quantities at this time are only 25-50'ish.

Thanks.
gm

Kevin T · May 31, 2019

I don't think you can call it a dowel pin once the threads are on it. Maybe call it a threaded indexing pin or a threaded locating pin will help the search

is this the kind of thing you are after?

gmoushon · Jun 1, 2019

Kevin T said:
I don't think you can call it a dowel pin once the threads are on it. Maybe call it a threaded indexing pin or a threaded locating pin will help the search

is this the kind of thing you are after?

View attachment 257829

Yes Kevin, that's exactly what I'm looking for. Thank you.

I've tried searching for that and I'm having trouble finding one "off-the-shelf". My guess is that it will have to be custom given the small size.

gm

Mike1974 · Jun 1, 2019

Shoulder screws (by default) are not nearly as precise in size as a dowel pin. Even looking at "precision" shoulder screws/bolts from McMaster the dia tol is listed at _.001/+0. Does that still work for your application?

I am thinking you will either need to have them custom machined, or 'settle' for a shoulder screw and turn the head off. I agree though, $4 each for 50 parts PLUS the labor kind of stings.

gmoushon · Jun 2, 2019

Mike1974 said:
Shoulder screws (by default) are not nearly as precise in size as a dowel pin. Even looking at "precision" shoulder screws/bolts from McMaster the dia tol is listed at _.001/+0. Does that still work for your application?

Yeah... The tolerance is not an issue. I found another company that has a much better price: Socket Head Shoulder Screw | Hex Head Shoulder Screw. Worst case I turn the head down myself but I plan to check with them next week to see what the cost would be if they turn it off for me.

Thanks.

lionelt · Jun 3, 2019

They are very like the threaded pin on the backgear ring on top of a Bridgeport mill.

Try a search for Slotted Set Screw Partially Thread.

Something may come up.

Slotted Set Screw, Partial Thread | Metric Screw & Tool

Buy Slotted Head Part Threaded Set / Grub Screws | 500,000+ Components | Accu(R)

lionelt · Jun 3, 2019

Also there are Shelf Support Pins

Hafele 282.39.705 Plug-In Shelf Support for 5mm dia M4 Threaded Dowels - AC Sissling

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Can anyone recommend source for miniature, (2-56), threaded dowel pin?

gmoushon

Cast Iron

Kevin T

Stainless

gmoushon

Cast Iron

Mike1974

Diamond

gmoushon

Cast Iron

lionelt

Stainless

lionelt

Stainless

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