4pcs 1/16" Serrated HARD Jaws for 12" Chuck, 12083100 ,4 jaw chuck jaws or 3

Description

For sale are 4 used pcs of HARD jaws,  .0625" x 90 degree serrated Jaws for a 12" Chuck-or ?, for a 4-jaw or 3-jaw chuck. The jaws have 90 degree points instead of 60 degree-as they were made for a 4-jaw instead of a 3-jaw chuck.  Each jaw is about 1.970" wide x 4.180" long x 2.2" high. As in the pics, If you use them on a 3-jaw chuck, the serrations look very good, especially for standard OD holding.
For ID holding, as pictured 1 of 4 jaws has part of the 1st ID step(smallest diameter ID holding step) is damaged, but the 2nd ID step is good. As pictured from the bottom of the bolt holes, a couple of the through holes only (not the counterbores on the opposite side) have been slightly elongated to accomodate a slightly larger length bolt to bolt hole distance.
I have more of these size used jaws (but soft jaws), (sets of 4) if interested, see my other listings or email me, I can do a package if you need more.
The bolt holes are for 16 mm bolts
(or 5/8")
, the spacing are about 30 mm or 1.181", the slot for the T-nuts are about 21 mm or .828".
Please make sure these fit your chucks, as the shipping will be high as these are very heavy. Jaws have 1/16" spacing by 90 degree serrations (NOT 60 deg x 1.5 mm), and are hardened steel. (a file does not even hardly dig into them at all) I am not sure what brand chucks these fit with the english serrations, but on Abbott chuck jaw website, it looks like there are many chucks that use them.
Thanks for looking.