Threaded Insert Taps
Screw thread insert taps (STI taps) operate in the same manner as “standard†taps, but produce an oversized thread specifically for threaded inserts. During insert installation, the threads cut by an STI tap form the insert into the desired thread size. STI taps are ideal for tapping holes in softer metals that require a strong threaded insert. STI taps are manufactured from high speed steel (HSS) for superior durability. We offer STI taps in a wide range of inch, metric, and spark plug sizes to meet your unique requirements.

Available In:
- Inch sizes from #2 to 3-1/2
- Metric sizes from M2.2 to M64
- Manufactured from high speed steel (HSS)
- Straight flute
- 4-thread lead
-
Sku #: 35L7H1-1Z50V-C20N
M20 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C20J
M20 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C18P
M18 x 2.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C18N
M18 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C18J
M18 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C16N
M16 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C16J
M16 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C14N
M14 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C14J
M14 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C12M
M12 x 1.75 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C12J
M12 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C12H
M12 x 1.25 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C11J
M11 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C11H
M11 x 1.25 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C11F
M11 x 1 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C10J
M10 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C10H
M10 x 1.25 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C10F
M10 x 1 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B90H
M9 x 1.25 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B60F
M6 x 1 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B50E
M5 x 0.8 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B40C
M4 x 0.7 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B35B
M3.5 x 0.6 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B30A
M3 x 0.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B259
M2.5 x 0.45 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B229
M2.2 x 0.45 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-B208
M2 x 0.4 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C14H
M14 x 1.25 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C12F
M12 x 1 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50C-150
1-1/2-12 STI Bottoming Tap - High Speed Steel

