# Vendor for hollow threaded rod - metric? **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [March 11, 2016, 6:05am UTC](https://community.cartalk.com/t/vendor-for-hollow-threaded-rod-metric/92744 "2016-03-11T06:05:46Z")\ **Posts on this page:** 4\ **Page:** 2
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [March 14, 2016, 2:34am UTC](https://community.cartalk.com/t/vendor-for-hollow-threaded-rod-metric/92744/21 "2016-03-14T02:34:11Z")
Yes , what I need is a hollow threaded rod with the thread on the outside, looking like this, only sized and threaded as M12-8 threads per cm bolt. I’d have thought there would a vendor for such a thing, but apparently not. ## [http://i.ebayimg.com/images/i/230598453590-0-1/s-l1000.jpg](http://i.ebayimg.com/images/i/230598453590-0-1/s-l1000.jpg) No worries, 1/4 inch standard iron pipe has an OD around 0.53 inch, so I can always drill out the existing threads and re-tap them as 1/4 inch iron pipe threads. Taps for standard iron pipe are cheap and easily available. And the hollow threaded rod for matching 1/4 inch iron pipe is easily found too. * * * I appreciate the interest of your expert mechanical folks here to find a different method, but for this question I’m only interested if that part is available is all. Like I say, there’s a simple alternative. There’s a second alternative, obtaining an M12-8 bolt and drilling the center out to make it hollow, then cutting off the bolt head. No threads to cut, but overall seems more complicated. ---
**Author:** ![Yosemite](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/yosemite/32/643_2.png) [@Yosemite](https://community.cartalk.com/u/Yosemite)\ **Post date:** [March 14, 2016, 8:25am UTC](https://community.cartalk.com/t/vendor-for-hollow-threaded-rod-metric/92744/22 "2016-03-14T08:25:35Z")
You would have to be pretty precise to drill out an 8 inch bolt. You’d get 7 inches down and the drill bit would come out the side of the bolt. Besides finding that long a drill bit would be harder. I thought that an M12 needed closer to a 7/16 shaft to get decent threads. So the 0.53 pipe would be too much and you would never get it started. But then I have no reference material right here, so I could be wrong. Do the threads have to go all the way from one end to the other? If you only need an inch of threads on each end; You could chuck up a piece of 1/4 inch pipe in a drill press and take one end down to the 7/16ths with a file while the drill press turns it (like a lathe). Then flip the piece around and do the other end. I’ve done this before and it works but is time consuming. 1/4 pipe would still have enough meat left after taking it down to 7/16. Yosemite ---
**Author:** ![Honda-Blackbird](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/honda-blackbird/32/3159_2.png) [@Honda-Blackbird](https://community.cartalk.com/u/Honda-Blackbird)\ **Post date:** [March 15, 2016, 4:28pm UTC](https://community.cartalk.com/t/vendor-for-hollow-threaded-rod-metric/92744/23 "2016-03-15T16:28:28Z")
Naw…you dont want to get into drilling out a threaded bolt… Unless you have a nice lathe? The lathe is about the only thing that can keep everything lined up perfectly while drilling it out. Blackbird ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [March 16, 2016, 2:46am UTC](https://community.cartalk.com/t/vendor-for-hollow-threaded-rod-metric/92744/24 "2016-03-16T02:46:19Z")
[http://www.globalspec.com/industrial-directory/brass\_hollow\_threaded\_rod](http://www.globalspec.com/industrial-directory/brass_hollow_threaded_rod) [Previous page](https://community.cartalk.com/t/vendor-for-hollow-threaded-rod-metric/92744.md?page=1)