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.

SwiftSert Standard Wall Inserts

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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  1. Product Type Bottoming Tap Remove This Item
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Product Type  
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  1. M2 x 0.4 1 item
  2. 2-56 1 item
  3. M2.2 x 0.45 1 item
  4. M2.5 x 0.45 1 item
  5. 3-48 1 item
  6. 3-56 1 item
  7. 4-40 1 item
  8. 4-48 1 item
  9. M3 x 0.5 1 item
  10. 5-40 1 item
  11. M3.5 x 0.6 1 item
  12. 6-32 1 item
  13. 6-40 1 item
  14. M4 x 0.7 1 item
  15. 8-32 1 item
  16. 8-36 1 item
  17. 10-24 1 item
  18. 10-32 1 item
  19. M5 x 0.8 1 item
  20. 12-24 1 item
  21. 12-28 1 item
  22. M6 x 1 1 item
  23. 1/4-20 1 item
  24. 1/4-28 1 item
  25. M7 x 1 1 item
  26. 5/16-18 1 item
  27. 5/16-24 1 item
  28. M8 x 1 1 item
  29. M8 x 1.25 1 item
  30. M9 x 1 1 item
  31. M9 x 1.25 1 item
  32. 3/8-16 1 item
  33. 3/8-24 1 item
  34. M10 x 1 1 item
  35. M10 x 1.25 1 item
  36. M10 x 1.5 1 item
  37. M11 x 1 1 item
  38. M11 x 1.25 1 item
  39. M11 x 1.5 1 item
  40. 7/16-14 1 item
  41. 7/16-20 1 item
  42. M12 x 1 1 item
  43. M12 x 1.25 1 item
  44. M12 x 1.5 1 item
  45. M12 x 1.75 1 item
  46. 1/2-13 1 item
  47. 1/2-20 1 item
  48. M14 x 1.25 1 item
  49. M14 x 1.5 1 item
  50. M14 x 2 1 item
  51. 9/16-12 1 item
  52. 9/16-18 1 item
  53. 5/8-11 1 item
  54. 5/8-18 1 item
  55. M16 x 1.5 1 item
  56. M16 x 2 1 item
  57. M18 x 1.5 1 item
  58. M18 x 2 1 item
  59. M18 x 2.5 1 item
  60. 3/4-10 1 item
  61. 3/4-16 1 item
  62. M20 x 1.5 1 item
  63. M20 x 2 1 item
  64. M20 x 2.5 1 item
  65. M22 x 1.5 1 item
  66. M22 x 2 1 item
  67. M22 x 2.5 1 item
  68. 7/8-14 1 item
  69. 7/8-9 1 item
  70. M24 x 1.5 1 item
  71. M24 x 2 1 item
  72. M24 x 3 1 item
  73. 1-12 1 item
  74. 1-14 1 item
  75. 1-8 1 item
  76. M26 x 1.5 1 item
  77. M27 x 1.5 1 item
  78. M27 x 2 1 item
  79. M27 x 3 1 item
  80. M28 x 1.5 1 item
  81. 1-1/8-12 1 item
  82. 1-1/8-7 1 item
  83. 1-1/8-8 1 item
  84. M30 x 1.5 1 item
  85. M30 x 2 1 item
  86. M30 x 3 1 item
  87. M30 x 3.5 1 item
  88. 1-1/4-12 1 item
  89. 1-1/4-7 1 item
  90. 1-1/4-8 1 item
  91. M33 x 2 1 item
  92. M33 x 3 1 item
  93. M33 x 3.5 1 item
  94. M34 x 1.5 1 item
  95. 1-3/8-12 1 item
  96. 1-3/8-6 1 item
  97. 1-3/8-8 1 item
  98. M36 x 1.5 1 item
  99. M36 x 2 1 item
  100. M36 x 3 1 item
  101. M36 x 4 1 item
  102. 1-1/2-12 1 item
  103. 1-1/2-6 1 item
  104. 1-1/2-8 1 item
  105. M39 x 3 1 item
  106. M39 x 4 1 item
  107. 1-5/8-8 1 item
  108. M42 x 3 1 item
  109. M42 x 4.5 1 item
  110. 1-3/4-8 1 item
  111. M45 x 2 1 item
  112. M45 x 4.5 1 item
  113. 1-7/8-8 1 item
  114. M48 x 3 1 item
  115. M48 x 5 1 item
  116. 2 in-8 1 item
  117. M52 x 3 1 item
  118. M52 x 5 1 item
  119. 2-1/8-8 1 item
  120. M54 x 3 1 item
  121. M56 x 3 1 item
  122. M56 x 4 1 item
  123. M56 x 5.5 1 item
  124. 2-1/4-8 1 item
  125. 2-3/8-8 1 item
  126. 2-1/2-8 1 item
  127. M64 x 3 1 item
  128. M64 x 4 1 item
  129. 2-5/8-8 1 item
  130. 2-3/4-8 1 item
  131. 2-7/8-8 1 item
  132. 3 in-8 1 item
  133. 3-1/8-8 1 item
  134. 3-1/4-8 1 item
  135. 3-3/8-8 1 item
  136. 3-1/2-8 1 item
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Items 1-30 of 136

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  1. 3-1/2-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-350N

    3-1/2-8 STI Bottoming Tap - High Speed Steel
    Special Price $1,329.05 Regular Price $2,336.25
  2. 3-3/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-337N

    3-3/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $1,395.60 Regular Price $2,453.25
  3. 3-1/4-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-325N

    3-1/4-8 STI Bottoming Tap - High Speed Steel
    Special Price $1,317.10 Regular Price $2,315.25
  4. 3-1/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-312N

    3-1/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $1,263.34 Regular Price $2,220.75
  5. 2-1/2-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-250N

    2-1/2-8 STI Bottoming Tap - High Speed Steel
    Special Price $774.20 Regular Price $1,225.00
  6. 2-3/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-237N

    2-3/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $694.88 Regular Price $1,099.50
  7. 2-1/4-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-225N

    2-1/4-8 STI Bottoming Tap - High Speed Steel
    Special Price $628.84 Regular Price $995.00
  8. 2-1/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-212N

    2-1/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $600.40 Regular Price $950.00
  9. 2"-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-200N

    2"-8 STI Bottoming Tap - High Speed Steel
    Special Price $376.36 Regular Price $595.50
  10. 1-7/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-187N

    1-7/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $461.61 Regular Price $536.00
  11. 1-3/4-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-175N

    1-3/4-8 STI Bottoming Tap - High Speed Steel
    Special Price $288.20 Regular Price $433.25
  12. 1-5/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-162N

    1-5/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $355.50 Regular Price $562.50
  13. 1-1/2-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-150N

    1-1/2-8 STI Bottoming Tap - High Speed Steel
    Special Price $234.82 Regular Price $353.00
  14. 1-3/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-137N

    1-3/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $291.03 Regular Price $437.50
  15. 1-1/4-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-125N

    1-1/4-8 STI Bottoming Tap - High Speed Steel
    Special Price $199.56 Regular Price $300.00
  16. 1-1/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-112N

    1-1/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $203.90 Regular Price $306.53
  17. 3"-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-300N

    3"-8 STI Bottoming Tap - High Speed Steel
    Special Price $1,109.32 Regular Price $1,950.00
  18. 2-7/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-287N

    2-7/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $652.26 Regular Price $1,032.05
  19. 2-3/4-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-275N

    2-3/4-8 STI Bottoming Tap - High Speed Steel
    Special Price $902.39 Regular Price $1,586.25
  20. 2-5/8-8 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50E-262N

    2-5/8-8 STI Bottoming Tap - High Speed Steel
    Special Price $772.25 Regular Price $1,357.50
  21. M48 x 3 STI Bottoming Tap - High Speed Steel

    Sku #: 35L7H1-1Z50V-C48Q

    M48 x 3 STI Bottoming Tap - High Speed Steel
    Special Price $571.61 Regular Price $904.45