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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
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Sku #: 35L7H1-1Z50E-350N
3-1/2-8 STI Bottoming Tap - High Speed SteelSpecial Price $1,329.05 Regular Price $2,336.25 -
Sku #: 35L7H1-1Z50E-337N
3-3/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $1,395.60 Regular Price $2,453.25 -
Sku #: 35L7H1-1Z50E-325N
3-1/4-8 STI Bottoming Tap - High Speed SteelSpecial Price $1,317.10 Regular Price $2,315.25 -
Sku #: 35L7H1-1Z50E-312N
3-1/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $1,263.34 Regular Price $2,220.75 -
Sku #: 35L7H1-1Z50E-250N
2-1/2-8 STI Bottoming Tap - High Speed SteelSpecial Price $774.20 Regular Price $1,225.00 -
Sku #: 35L7H1-1Z50E-237N
2-3/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $694.88 Regular Price $1,099.50 -
Sku #: 35L7H1-1Z50E-225N
2-1/4-8 STI Bottoming Tap - High Speed SteelSpecial Price $628.84 Regular Price $995.00 -
Sku #: 35L7H1-1Z50E-212N
2-1/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $600.40 Regular Price $950.00 -
Sku #: 35L7H1-1Z50E-200N
2"-8 STI Bottoming Tap - High Speed SteelSpecial Price $376.36 Regular Price $595.50 -
Sku #: 35L7H1-1Z50E-187N
1-7/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $338.75 Regular Price $536.00 -
Sku #: 35L7H1-1Z50E-175N
1-3/4-8 STI Bottoming Tap - High Speed SteelSpecial Price $288.20 Regular Price $433.25 -
Sku #: 35L7H1-1Z50E-162N
1-5/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $355.50 Regular Price $562.50 -
Sku #: 35L7H1-1Z50E-150N
1-1/2-8 STI Bottoming Tap - High Speed SteelSpecial Price $234.82 Regular Price $353.00 -
Sku #: 35L7H1-1Z50E-137N
1-3/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $291.03 Regular Price $437.50 -
Sku #: 35L7H1-1Z50E-125N
1-1/4-8 STI Bottoming Tap - High Speed SteelSpecial Price $199.56 Regular Price $300.00 -
Sku #: 35L7H1-1Z50E-112N
1-1/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $203.90 Regular Price $306.53 -
Sku #: 35L7H1-1Z50V-C56W
M56 x 5.5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C56Q
M56 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C52V
M52 x 5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50E-300N
3"-8 STI Bottoming Tap - High Speed SteelSpecial Price $1,109.32 Regular Price $1,950.00 -
Sku #: 35L7H1-1Z50E-287N
2-7/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $652.26 Regular Price $1,032.05 -
Sku #: 35L7H1-1Z50E-275N
2-3/4-8 STI Bottoming Tap - High Speed SteelSpecial Price $902.39 Regular Price $1,586.25 -
Sku #: 35L7H1-1Z50E-262N
2-5/8-8 STI Bottoming Tap - High Speed SteelSpecial Price $772.25 Regular Price $1,357.50 -
Sku #: 35L7H1-1Z50V-C48V
M48 x 5 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C64Q
M64 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C64T
M64 x 4 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C54Q
M54 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C52Q
M52 x 3 STI Bottoming Tap - High Speed Steel -
Sku #: 35L7H1-1Z50V-C48Q
M48 x 3 STI Bottoming Tap - High Speed SteelSpecial Price $571.61 Regular Price $904.45 -
Sku #: 35L7H1-1Z50V-C56T
M56 x 4 STI Bottoming Tap - High Speed Steel