STI Spiral Flute Taps for Ferrous and Non-ferrous Materials


General Purpose tap series provides exceptional value for tapping helicoil (STI) threads in a variety of ferrous and nonferrous metals.


HSS material

Increased wear resistance

Spiral Flute

For blind hole applications

Inch & Metric

Complete Offering

Screw thread insert capability

Repair stripped threaded holes

Application Guide

ISO Work Material Recommended
P Low Carbon Steel : 1010, 1018
P Medium Carbon Steel : 1035, 1045
P High Carbon Steel : 1065
P Alloy Steels : 4140, 4340
P Die Steels
M Stainless Steels : 300
M Stainless Steels : 400
M Stainless Steels : 17-4PH
K Cast Iron
N Aluminum : 6061, 7075
N Aluminum : Casting
S Nickel Alloy : Inconel
S Titanium : 6AL4V (30HRC)
H Hardened Steels : ~35 HRC
H Hardened Steels : 35-45 HRC
H Hardened Steels : 45-50 HRC
H Hardened Steels : 50-70 HRC

good best



List S108 - GENERAL PURPOSE View Offering >   View Overview >

List S109 - GENERAL PURPOSE View Offering >   View Overview >



Aluminum Alloys, Cast Aluminum, Cast Iron, Carbon Steels


Additional Information

When grinding or regrinding industrial cutting tools, residual grinding dust may occur. This dust may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm.
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