5/16" UNC HSS Taper Hand Tap Sutton

For producing precision threads by hand tapping, for starting threads - either second or bottoming taps should used after to achieve desire thread depth.
General purpose use
Suitable for materials up to 1000N/mm2
Through & blind holes
Suitable for both hand and machine operations
Threads per inch 18
Overall length 72mm
Cutting length 22mm
Drill diameter 6.6mm