Sign in to follow this  
Steeler

Unusual threads

Recommended Posts

I got these 3/4" threaded rods from my local scrap metal yard. The thread roots are unusually round and the count is 4.5 TPI. The nuts are made for this thread shape and spin easily on the rods. I wonder at the origin of these parts and what they were used for. Could I use them to build a light weight fly press or?

post-9588-011644400 1275436559_thumb.jpg

Share this post


Link to post
Share on other sites

I got these 3/4" threaded rods from my local scrap metal yard. The thread roots are unusually round and the count is 4.5 TPI. The nuts are made for this thread shape and spin easily on the rods. I wonder at the origin of these parts and what they were used for. Could I use them to build a light weight fly press or?


Those are called dywidag bolts and are used for high tensile concrete anchor applications. They are made of cr-mo similar to astm 4140 steel.

Share this post


Link to post
Share on other sites

Those are called dywidag bolts and are used for high tensile concrete anchor applications. They are made of cr-mo similar to astm 4140 steel.



Thanks NeatGuy. I Googled dywidag and found lots of info about this anchoring system that I was previously unaware of. Dunno what I will use them for but they are cool as heck.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this