Size: 5/16-181/4″: 5/16″Across the Flat: 0.69″
HSS BSPF
5/8-14 BSPF Taper Tap
1/2-14 BSPF Plug Tap
1/8-28 BSPF Bottom Tap
1 1/4-11 BSPF Taper Tap
5/8-14 BSPF Plug Tap
3/8-19 BSPF Taper Tap
1/2-14 BSPF Bottom Tap
1″-11 BSPF Bottom Tap
7/8-14 BSPF Bottom Tap
1/4-19 BSPF Taper Tap