What's the diameter of the PT3/8 internal thread drill?
With the 8.1 PT3/8 drill holeThis is its nominal diameter, the actual processing, I suggest you try to make the hole bigger.
A spiral shaped continuous raised part having a specified cross section on the surface of a cylinder or cone. According to its parent thread shape is divided into cylindrical and conical screw threads; according to their position in the matrix is divided into outer and inner thread, according to the section shape (teeth) divided into triangular thread, rectangular screw, trapezoidal thread, serrated thread and other special shape screw.
Dia 14.3-14.4.PT is the old standard, and it is also written as BSPT. Now the new standard is Rc, the same.
