Spiral Fluted Tap Overall
length
L
Chamfer +
full thread
ℓt
Thread
length

Thread+Neck
length
ℓn
Shank
length
ℓs
Shank
dia.
Ds
Size of
square
K
Length of
square
ℓk
SP OX STI Spiral Fluted Taps for Helical Coil Wire Screw Thread Inserts, Oxided
L ℓ ℓn ℓs Ds K ℓk No. of
Spiral Pointed Taps Spiral Fluted Taps Spiral Fluted Taps
(for blind hole)


Size Class Code Chamfer Type
(inch) (inch) (inch) (inch) (inch) (inch) (inch) flutes
GH2 SUU07Q2NEX
STI 7/16-14UNC 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3
GH3 SUU07Q3NEX
GH2 SUU07N2NEX
STI 7/16-20UNF 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3
(for through hole)


GH3 SUU07N3NEX
GH2 SUU08R2NEX
STI 1/2-13UNC 2P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 3
GH3 SUU08R3NEX
GH2 SUU08N2NEX
STI 1/2-20UNF 2P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 3
GH3 SUU08N3NEX
(for through hole)
Hand Taps
Cemented
Carbide Taps Roll Taps
Pipe Taps Simple Inspection Tools
Thread Mills
Dies
Center Drills
Centering Tools


ANSI
SP-25
212