Overall Thread Thread+Neck Size of Length of
Shank dia.
Length Length length square square

L ℓ ℓn Ds K ℓk


(for blind hole)
Spiral Fluted Taps Spiral Fluted Taps Spiral Pointed Taps
(for through hole)
(for through hole)
Hand Taps
Carbide Taps
Cemented
Roll Taps
Simple Inspection Tools
Special Thread Taps
Pipe Taps
Thread Mills
Dies
Center Drills
Centering Tools


JIS
◎=Standard ○=Semi standard △=Made to order ST-12
※For improvement, spec may change without advance notice. 147
For improvement, spec may change without advance notice. 535