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Through-tapped self-tapping inserts (Series STT) are shouldered, undercut and have metric internal threads. However, the main difference that makes these inserts stand out is the external threads are a 30 degree self-tapping form with a three notch cutting relief that work in a similar way as the blind self-tapping inserts.

 This type of insert has a special 30 degree external tapping thread, and three milled notches to aid the cutting action. These inserts are manufactured in stainless steel 303 and marine grade stainless steel 316.

Through-Tapped Self-Tapping Inserts (Series STT)

Part # M3395 M3396 / M3442 M3407 M3397 M3215
Nominal Thread Size M4 M5 M6 M8 M10
Length 9mm 10mm or 12mm 12mm 15mm 20mm
ID M4 X 0.7 M5 X 0.8 M6 X 1.0 M8 X 1.25 M10 X 1.5
OD 6.0mm 8.0mm 9.0mm 12.0mm 14.0mm
OD Thread-Type & Pitch 30 degree flank self-tapping P=1.25mm 30 degree flank self-tapping P=1.5mm 30 degree flank self-tapping P=1.75mm 30 degree flank self-tapping P=2.0mm 30 degree flank self-tapping P=2.5mm
Cutting Relief 3 x milled notch 3 x milled notch 3 x milled notch 3 x milled notch 3 x milled notch



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