[17x69mm]
[21x73mm]
Description:
High speed steel, 4 flutes, 60 degree thread.
Suitable for machine use to cut threads to the bottom of a blind hole.
A bottoming is usually used to cut threads in a hole that has already been partially threaded using one of the more tapered types of .
Taper Style: Starts the thread square with the workpiece.
Plug Style: Generally used in through holes.
Hand tap is used to re-thread damaged or jammed threads, also be used to thread mild steels.
Mainly used for hand use, tapping the vast majority of materials in through or blind holed conditions.