Hornady comparator thumb / set screw size

[dgeesaman]

I want to eliminate unnecessary grub screws and Allen keys from my bench and I'm having trouble with this one. It seems to measure M3.5x0.75mm threads, but that is a really odd size.

Before I get out a drill and tap a new hole in it, has anyone figured out where to get one?

 

[dkhunt14]

I would take it to a hardware store that stocks a lot of sizes. I then would try till i get one to fit. I can't believe it would be metric. It takes a standard allen wrench . Matt

 

[dgeesaman]

Gah, I'm an idiot. Measure the grub screw threads not the brass thumb screws. Steel threads are much sharper than brass. Looks like it's #6-32 threads.

PS: if you're anal retentive you might discover the brass screws are made from metric thumb screws threaded with english threads. Welcome to global manufacturing.

 

[Dusty Stevens]

Buy another comparator and get the screw out of it. Or call hornady and get a replacement. Im sure they make them in house

 

[mmcu]

6-32 is the correct size.

 

[Uncle Ed]

6-32 is the correct size.

mmcu is 100% correct at 6-32, I just checked my set screw on my Hornady cartridge case headspace gauge between the silver and red sections.

 

[JimSC]

when I lost mine I used a 6- 32 thumb screw trimmed to about 1/2 - 3/4 inch

 

[hogpatrol]

Another option: take 6-32 socket head cap screws along with Shear-Loc knobs and make your own. They're made in different sizes. These are for a #6 and the thread size doesn't matter. They're pressed in to the head of the screw.

 

[dgeesaman]

Another option: take 6-32 socket head cap screws along with Shear-Loc knobs and make your own. They're made in different sizes. These are for a #6 and the thread size doesn't matter. They're pressed in to the head of the screw.

That’s a good option.

I’m planning to buy brass thumbscrews in the exact size from McMaster Carr for $3 each.

 

[mtncwru]

This is a terrific idea! Thanks for sharing!

 

[BillPa]

I’m planning to buy brass thumbscrews in the exact size from McMaster Carr for $3 each.

IIRC these were sump'm like a buck and change at the local hardware store..

Bill

 

[Papa Charlie]

You can purchase the Brass Thumb Screws from McMaster-Carr. Here is the link:

https://www.mcmaster.com/brass-thumb-screws

 

[dgeesaman]

One last note: #6-32 is the thread size used throughout PC computer cases, and it's not uncommon to find these with thumbscrew style heads. So I never needed to order any since I found a couple in a bag of leftover computer screws.

 

[BOB LEE SWAGGER]

What size is the tiny one that holds the interchangeable heads???

 

[Richard Jones]

What size is the tiny one that holds the interchangeable heads???

Mine is a 6-32.

 

[Papa Charlie]

You can get them from McMaster Carr

https://www.mcmaster.com/95488a152

 

[hogpatrol]

Home Depot has 6/32 socket head cap screws.