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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Product Type  
ID Thread Rotation  
Inside Thread  
  1. M2 x 0.4 2 items
  2. 2-56 2 items
  3. M2.2 x 0.45 2 items
  4. M2.5 x 0.45 2 items
  5. 3-48 2 items
  6. 3-56 2 items
  7. 4-40 2 items
  8. 4-48 2 items
  9. M3 x 0.5 2 items
  10. 1/8-40 1 item
  11. 5-40 2 items
  12. M3.5 x 0.6 2 items
  13. 6-32 2 items
  14. 6-40 2 items
  15. M4 x 0.7 2 items
  16. 8-32 2 items
  17. 8-36 2 items
  18. 3/16-24 1 item
  19. 10-24 2 items
  20. 10-32 2 items
  21. M5 x 0.8 2 items
  22. 12-24 2 items
  23. 12-28 2 items
  24. M6 x 1 3 items
  25. 1/4-20 5 items
  26. 1/4-26 1 item
  27. 1/4-28 3 items
  28. M7 x 1 2 items
  29. 5/16-18 4 items
  30. 5/16-22 1 item
  31. 5/16-24 3 items
  32. M8 x 1 3 items
  33. M8 x 1.25 3 items
  34. M9 x 1 2 items
  35. M9 x 1.25 2 items
  36. 3/8-16 4 items
  37. 3/8-20 1 item
  38. 3/8-24 3 items
  39. 1/8-28 1 item
  40. M10 x 1 2 items
  41. M10 x 1.25 3 items
  42. M10 x 1.5 3 items
  43. 1/8-27 1 item
  44. M11 x 1 2 items
  45. M11 x 1.25 2 items
  46. M11 x 1.5 2 items
  47. 7/16-14 4 items
  48. 7/16-18 1 item
  49. 7/16-20 3 items
  50. M12 x 1 2 items
  51. M12 x 1.25 3 items
  52. M12 x 1.5 2 items
  53. M12 x 1.75 3 items
  54. 1/2-12 1 item
  55. 1/2-13 3 items
  56. 1/2-16 1 item
  57. 1/2-20 3 items
  58. 1/4-19 1 item
  59. 1/4-18 1 item
  60. M14 x 1.25 2 items
  61. M14 x 1.5 3 items
  62. M14 x 2 3 items
  63. 9/16-12 2 items
  64. 9/16-18 3 items
  65. 5/8-11 4 items
  66. 5/8-14 2 items
  67. 5/8-18 3 items
  68. M16 x 1.5 3 items
  69. M16 x 2 3 items
  70. 3/8-19 1 item
  71. 3/8-18 1 item
  72. M18 x 1.5 3 items
  73. M18 x 2 2 items
  74. M18 x 2.5 3 items
  75. 3/4-10 4 items
  76. 3/4-12 1 item
  77. 3/4-16 3 items
  78. M20 x 1.5 3 items
  79. M20 x 2 2 items
  80. M20 x 2.5 3 items
  81. 1/2-14 2 items
  82. M22 x 1.5 3 items
  83. M22 x 2 2 items
  84. M22 x 2.5 2 items
  85. 7/8-11 1 item
  86. 7/8-14 4 items
  87. 7/8-18 1 item
  88. 7/8-9 4 items
  89. M24 x 1.5 2 items
  90. M24 x 2 3 items
  91. M24 x 3 3 items
  92. 1-10 1 item
  93. 1-12 2 items
  94. 1-14 3 items
  95. 1-8 4 items
  96. M26 x 1.5 2 items
  97. 3/4-14 2 items
  98. M27 x 1.5 2 items
  99. M27 x 2 2 items
  100. M27 x 3 2 items
  101. M28 x 1.5 2 items
  102. 1-1/8-12 2 items
  103. 1-1/8-7 2 items
  104. 1-1/8-8 2 items
  105. M30 x 1.5 2 items
  106. M30 x 2 2 items
  107. M30 x 3 2 items
  108. M30 x 3.5 2 items
  109. 1-1/4-12 2 items
  110. 1-1/4-7 2 items
  111. 1-1/4-8 2 items
  112. M33 x 2 2 items
  113. M33 x 3 2 items
  114. M33 x 3.5 2 items
  115. 1-11 1 item
  116. 1-11-1/2 1 item
  117. M34 x 1.5 2 items
  118. 1-3/8-12 2 items
  119. 1-3/8-6 2 items
  120. 1-3/8-8 2 items
  121. M36 x 1.5 2 items
  122. M36 x 2 2 items
  123. M36 x 3 2 items
  124. M36 x 4 2 items
  125. 1-1/2-12 2 items
  126. 1-1/2-6 2 items
  127. 1-1/2-8 2 items
  128. M39 x 3 2 items
  129. M39 x 4 2 items
  130. M42 x 3 2 items
  131. 1-5/8-8 2 items
  132. 1-1/4-11 1 item
  133. M42 x 4.5 2 items
  134. 1-3/4-8 2 items
  135. M45 x 2 2 items
  136. M45 x 4.5 2 items
  137. 1-7/8-8 2 items
  138. M48 x 3 2 items
  139. M48 x 5 2 items
  140. 2 in-8 2 items
  141. M52 x 3 2 items
  142. M52 x 5 2 items
  143. 2-1/8-8 2 items
  144. M54 x 3 2 items
  145. M56 x 3 2 items
  146. M56 x 4 2 items
  147. M56 x 5.5 2 items
  148. 2-1/4-8 2 items
  149. 2-3/8-8 2 items
  150. 2-1/2-8 2 items
  151. M64 x 3 2 items
  152. M64 x 4 2 items
  153. 2-5/8-8 2 items
  154. 2-3/4-8 2 items
  155. 2-7/8-8 2 items
  156. 3 in-8 2 items
  157. 3-1/8-8 2 items
  158. 3-1/4-8 2 items
  159. 3-3/8-8 2 items
  160. 3-1/2-8 2 items
Decimal Outside Diameter  
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Items 1-30 of 395

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

    SKU: 35L7H1-1Z50E-350N

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

    SKU: 35L7H1-1Z50E-337N

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

    SKU: 35L7H1-1Z50E-325N

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

    SKU: 35L7H1-1Z50E-312N

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

    SKU: 35L7H1-1Z50E-250N

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

    SKU: 35L7H1-1Z50E-237N

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

    SKU: 35L7H1-1Z50E-225N

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

    SKU: 35L7H1-1Z50E-212N

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

    SKU: 35L7H1-1Z50E-200N

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

    SKU: 35L7H1-1Z50E-187N

    Special Price $338.75 Regular Price $536.00
  11. 1-3/4-8 STI Bottoming Tap - High Speed Steel
    1-3/4-8 STI Bottoming Tap - High Speed Steel

    SKU: 35L7H1-1Z50E-175N

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

    SKU: 35L7H1-1Z50E-162N

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

    SKU: 35L7H1-1Z50E-150N

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

    SKU: 35L7H1-1Z50E-137N

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

    SKU: 35L7H1-1Z50E-125N

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

    SKU: 35L7H1-1Z50E-112N

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

    SKU: 35L7H1-1Z50E-300N

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

    SKU: 35L7H1-1Z50E-287N

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

    SKU: 35L7H1-1Z50E-275N

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

    SKU: 35L7H1-1Z50E-262N

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

    SKU: 35L7H1-1Z50V-C48Q

    Special Price $571.61 Regular Price $904.45