Here is a Nice set of 4 New chasers still in the packaging

15 degree H and 20 degree C

Threads are 7/8" - 9 Tpi

Dimensions are 5/8" wide x 5/8" Long x 5/32" thick with a .210" diameter hole. 

Series 100

I believe they hs hss high speed steel

EDP 82288

Condition ............... New in mfg packaging

This is not an actual photo but it is pretty much identical to the one in the photo. I have had a few of them in the past that were pretty much all the same so I have used this same photo for each one.