Size: 5/16-241/4″: 5/16″Across the Flat: 0.69″
HSS BSPF
1/8-28 BSPF Taper Tap
3″-11 BSPF Taper Tap
1/16-28 BSPF Plug Tap
1 1/2-11 BSPF Taper Tap
2 1/4-11 BSPF Taper Tap
1/8-28 BSPF Plug Tap
3/4-14 BSPF Taper Tap
3″-11 BSPF Plug Tap
1″-11 BSPF Bottom Tap
5/8-14 BSPF Taper Tap