I have a customer in the oil business, he has a franks 658 service rig, this peice are 3ft long and help supports the derek, and it call for grade 12 all thread never herd of it
I suppose by Allthread you mean threaded bar? Some people call it studding or stud bolts.
It could be bolt material grade, grade 12 has minimum UTS 120 kgf/mm2. Only thing is bolts are usually graded 8.8, 10.9, 12.9 etc, to signify 80,100, 120 kgf/mm2 UTS, and stress at permant set 80, 90, 90 % of UTS. Nut grades are just 8, 10, 12 etc.
Above is for metric bolts but it could be what you're after.
Cheers...........Codey
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All Thread What is Grade 12
Re: All Thread What is Grade 12
