Greenfield Threading 306311 Bright Bottoming Straight Flute Hand Taps, 4FL, 1/2"-13 Tool Size, UNC

#8-32NC HTGP H2 4FL GP BOTTOM HAND TAP

3/4-10NC HTGP H3 4FL GPBOTTOM HAND TAP

#4-40NCHTGP H2 3FL GP BOTTOM HAND TAP

1/4-20NC HTGP H2 4FL GPPLUG HAND TAP

1/2-20NF HTGP H3 4FL GPBOTTOM HAND TAP