Draw studs for 1/2" bolts- interest in a group purchase?

Draw studs for pulling the sleeves of 1/2" bolts are not readily available. There are automotive studs, but they are very short. I checked with a place in Texas that produces a lot of custom fasteners thinking the price might be right to get a bunch of them made. This is the quote I got:

Still pretty pricey. I'm not sure that there is enough demand out there to commission several thousand dollars. 

Garage-made will probably remain the way to go - chime in and prove me wrong if many of you reading this would pay ~$34 for a well made draw stud.

I have lathes and these would be easy to make. I'd be happy to make a few but mass production isn't of interest. Could they be made from a 7/16" bolt by turning down the head to 1/2" and threading the result? The 1/2" threads would be a bit short but probably good enough.

I reamed out a McMaster coupling nut and tapped it 7/16 and then screwed in some 7/16 all-thread to make a puller for my YABR. You've got the tap already because you're tapping the sleeves. All you need is a drill press to do the reaming.

ACE had a handful of ~4.5" draw studs made back in 2013. They cost ~$37.50 each, and eventually all of them got bent or the threads got mashed against the walls in use. It is probably better to use a custom coupling nut instead. Dan- that's a nice offer. I don't personally need one of these, tho. A climber from RRG asked me about them. 

Instead of using All-thread (Grade 2?), McMaster-Carr does have double-end connecting rods [ https://www.mcmaster.com/products/connecting-rods/connecting-rods-5/ ] - Unfortunately they only make the 7/16-20 x 3" version in aluminum. The 6" version has 2" of thread on each end, so you could lop a bit off each end and still use it. Might be more durable than the All-thread.

I got a hand full of the double ended ones from McMaster Carr.  Nice wrench flats in the middle. Short ones for the 2 3/4 bolts and longer ones for the long 5 piece. I mostly deal with the 2 3/4 here. The thread length is just 1" but that is enough to do the job. Had them for a while. 

I bought a bunch of couple nuts 1/2" on one side 3/8 on the other. Mod the 3/8 side as necessary for 10mm, 7/16", 12mm...

Those would need to be pretty special for me to justify the price.

I know Greg likes 7/16x20, but I’ve been using 7/16x14 as it’s more readily available. McMaster has 7/16x14 setup studs in 1.5, 2, and 3” lengths for less than $4, and they do already have the flats on them. https://www.mcmaster.com/product/90281A313

I’ve not seen any comercial couplers 1/2x20-7/16 but making them is pretty easy.  

I completey overlooked the thread pitch. Course thread works fine for me.

bmdhacks wrote:

I reamed out a McMaster coupling nut and tapped it 7/16 and then screwed in some 7/16 all-thread to make a puller for my YABR. You've got the tap already because you're tapping the sleeves. All you need is a drill press to do the reaming.

This is exactly what I did. Had to buy 7/16” rod by the foot and cut it to size, then I used a 3/8” coupler nut that I drilled and tapped one side of to 7/16”. Added a short 3/8” threaded rod to the end so I can just slap it onto my Hurley Jr

Did you try getting a quote from protolabs or xometry?