Size: No 3-56Thickness: 1/4″O/D: 13/16
HSS UNC
No 4-40 HSS UNC Die
1/2-13 HSS UNC Die
1/4-20 HSS UNC Die
No 12-24 HSS UNC Die
5/16-18 HSS UNC Die
9/16-12 HSS UNC Die
7/16-14 HSS UNC Die