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-C45N
M45 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C39T
M39 x 4 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C36T
M36 x 4 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C36Q
M36 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C36N
M36 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C36J
M36 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C34J
M34 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C33R
M33 x 3.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C33Q
M33 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C33N
M33 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C30R
M30 x 3.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C30Q
M30 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C30N
M30 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C30J
M30 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C28J
M28 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C27Q
M27 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C42Q
M42 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C39Q
M39 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C45U
M45 x 4.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C42U
M42 x 4.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C27N
M27 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C27J
M27 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C26J
M26 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C24Q
M24 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C24N
M24 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C24J
M24 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C22P
M22 x 2.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C22N
M22 x 2 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C22J
M22 x 1.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C20P
M20 x 2.5 STI Bottoming Tap - High Speed Steel

