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Taps

Taps

Taps cut internal threads in drilled holes. The Sutton Tools and Alpha tap range covers metric coarse, metric fine, UNC, UNF, BSW and BSF series in sizes M2.5 through M30 (and equivalent imperial), in three cutting forms - spiral point gun taps for through-hole production, spiral flute taps for blind-hole chip evacuation, and straight flute taps for hand tapping and general-purpose workshop use.

Also known as: Gun Tap, Machine Tap, Hand Tap, Spiral Point Tap, Spiral Flute Tap, Straight Flute Tap, Bottoming Tap, Taper Tap, Plug Tap, Sutton Tap, Alpha Tap, HSSE Tap, M35 Tap.

Taps are ground from HSS (high-speed steel) or HSSE (HSS with 5% cobalt, also called M35). HSSE holds a cutting edge longer in stainless and tougher alloys. The 600+ SKU range here is stocked specifically to cover the workshop and production tapping needs that turn up most often in Australian fabrication, marine, mining and general manufacturing.

GRADES AND MATERIALS

HSS: High-speed steel - the standard for hand taps and general-purpose machine taps in mild steel, brass and aluminium. Holds edge through several hundred cycles in mild steel. The Alpha straight-flute tap range is HSS.

HSSE (M35): HSS with 5% cobalt, raising heat resistance and edge hardness. Required for repeated tapping in stainless, alloy steel and tough castings. The Sutton spiral-point gun-tap range and most production grades use HSSE. The cobalt also improves wear at higher cutting speeds.

Surface treatments: Some taps are supplied bright (no coating), others nitrided or steam-tempered (slight black/blue oxide for chip-flow improvement and corrosion protection in storage). Coating choice doesn't change cutting performance materially - it's primarily a wear and storage consideration.

DRIVE AND INSTALLATION

Hand taps drive with a tap wrench - the operator turns one to two cycles forward, then reverses a half-turn to break chips. Spiral point gun taps drive from a drill press or CNC head with constant cutting fluid. Spiral flute taps drive the same way but with deeper cut depth and slower spindle speed. Always confirm pilot hole size before starting - tap drill = nominal diameter minus pitch (M8 x 1.25p = 6.75mm pilot).

THREAD LENGTH AND MEASUREMENTS

Tap length is fixed by ISO 529 dimensions for hand and machine taps - M3 through M12 are typically 60-65mm overall length, M16+ are 90mm+ overall. The cutting length depends on the tap form: taper taps have a longer chamfer (3-5 lead threads), plug taps have a medium chamfer (3 lead threads), bottoming taps have a short chamfer (1-2 lead threads) for cutting into the bottom of a blind hole. The renderer auto-emits the per-SKU length and chamfer info.

WHY AUSTRALIA TRUSTS BOLT & NUT

With 15+ years selling fasteners online from Brisbane, we hold over 25,000 stock lines and 200 million pieces - 98.75% of online orders placed before 1pm leave same day. Save more as you buy more - we offer up to 13 price breaks plus 3 spend-tier discounts. Read our customer reviews or get in touch if you need help picking the right tap.

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Sutton Tools and Alpha taps in HSS and HSSE - spiral point gun taps for through-hole production, spiral flute for blind holes, straight flute for hand tapping. Sizes M2.5 through M30 metric, plus UNC, UNF, BSW and BSF imperial.

TECHNICAL RESOURCES

Tap-drill size chart, ISO 529 spec sheets, and metric / imperial cross-reference: Technical Resources. For dies that match these taps (external thread cutting), see Die Nuts. For single-operation drill-and-tap, see Combination Drill & Taps.

Filter by :
Filter By
Category
System of Measurement
  1. Metric 131 items
  2. Imperial 201 items
Size
  1. M1.6 (1.6mm) 1 item
  2. M2 (2mm) 4 items
  3. M2.5 (2.5mm) 5 items
  4. M3 (3mm) 5 items
  5. M3.5 (3.5mm) 5 items
  6. M4 (4mm) 5 items
  7. M5 (5mm) 5 items
  8. M6 (6mm) 5 items
  9. M7 (7mm) 4 items
  10. M8 (8mm) 9 items
  11. M9 (9mm) 1 item
  12. M10 (10mm) 12 items
  13. M11 (11mm) 1 item
  14. M12 (12mm) 13 items
  15. M14 (14mm) 9 items
  16. M16 (16mm) 9 items
  17. M18 (18mm) 9 items
  18. M20 (20mm) 9 items
  19. M22 (22mm) 8 items
  20. M24 (24mm) 8 items
  21. M27 (27mm) 1 item
  22. M30 (30mm) 1 item
  23. M33 (33mm) 1 item
  24. M36 (36mm) 1 item
  25. #5-40 4 items
  26. #5-44 1 item
  27. 1/8" 4 items
  28. #6-32 4 items
  29. #6-40 4 items
  30. 5/32" 4 items
  31. #8-32 4 items
  32. #8-36 4 items
  33. 3/16" 8 items
  34. 3/16" (#10-24) 2 items
  35. #10-24 (3/16") 4 items
  36. #10-32 (3/16") 4 items
  37. #12-24 4 items
  38. #12-28 4 items
  39. 1/4" 15 items
  40. 5/16" 15 items
  41. 3/8" 15 items
  42. 7/16" 15 items
  43. 1/2" 16 items
  44. 9/16" 15 items
  45. 5/8" 15 items
  46. 3/4" 12 items
  47. 7/8" 12 items
  48. 1" 12 items
  49. 1-1/8" 2 items
  50. 1-1/4" 2 items
Size & Thread Pitch
  1. M1.6 x 0.35p Coarse 1 item
  2. M2 x 0.40p Coarse 4 items
  3. M2.5 x 0.45p Coarse 5 items
  4. M3 x 0.50p Coarse 5 items
  5. M3.5 x 0.60p Coarse 5 items
  6. M4 x 0.70p Coarse 5 items
  7. M5 x 0.80p Coarse 5 items
  8. M6 x 1.00p Coarse 5 items
  9. M7 x 1.00p Coarse 4 items
  10. M8 x 1.00p Fine 4 items
  11. M8 x 1.25p Coarse 5 items
  12. M9 x 1.25p Coarse 1 item
  13. M10 x 1.00p Extra Fine 3 items
  14. M10 x 1.25p Fine 4 items
  15. M10 x 1.50p Coarse 5 items
  16. M11 x 1.50p Coarse 1 item
  17. M12 x 1.25p Extra Fine 4 items
  18. M12 x 1.50p Fine 4 items
  19. M12 x 1.75p Coarse 5 items
  20. M14 x 1.50p Fine 4 items
  21. M14 x 2.00p Coarse 5 items
  22. M16 x 1.50p Fine 4 items
  23. M16 x 2.00p Coarse 5 items
  24. M18 x 1.50p Fine 4 items
  25. M18 x 2.50p Coarse 5 items
  26. M20 x 1.50p Fine 4 items
  27. M20 x 2.50p Coarse 5 items
  28. M22 x 1.50p Fine 4 items
  29. M22 x 2.50p Coarse 4 items
  30. M24 x 2.00p Fine 4 items
  31. M24 x 3.00p Coarse 4 items
  32. M27 x 3.00p Coarse 1 item
  33. M30 x 3.50p Coarse 1 item
  34. M33 x 3.50p Coarse 1 item
  35. M36 x 4.00p Coarse 1 item
  36. 1/8" x 40 TPI BSW 4 items
  37. #5-40 TPI UNC 4 items
  38. #5-44 TPI UNF 1 item
  39. 5/32" x 32 TPI BSW 4 items
  40. #6-32 TPI UNC 4 items
  41. #6-40 TPI UNF 4 items
  42. #8-32 TPI UNC 4 items
  43. #8-36 TPI UNF 4 items
  44. 3/16" x 24 TPI BSW 4 items
  45. #10-24 (3/16") x 24 TPI UNC 4 items
  46. 3/16" (#10-24) x 24 TPI UNC 1 item
  47. #10-32 (3/16") x 32 TPI UNF 4 items
  48. 3/16" (#10-32) x 32 TPI UNF 1 item
  49. 3/16" x 32 TPI BSF 4 items
  50. #12-24 TPI UNC 4 items
  51. #12-28 TPI UNF 4 items
  52. 1/4" x 20 TPI UNC 4 items
  53. 1/4" x 20 TPI BSW 3 items
  54. 1/4" x 26 TPI BSF 4 items
  55. 1/4" x 28 TPI UNF 4 items
  56. 5/16" x 18 TPI BSW 3 items
  57. 5/16" x 18 TPI UNC 4 items
  58. 5/16" x 22 TPI BSF 4 items
  59. 5/16" x 24 TPI UNF 4 items
  60. 3/8" x 16 TPI BSW 3 items
  61. 3/8" x 16 TPI UNC 4 items
  62. 3/8" x 20 TPI BSF 4 items
  63. 3/8" x 24 TPI UNF 4 items
  64. 7/16" x 14 TPI BSW 3 items
  65. 7/16" x 14 TPI UNC 4 items
  66. 7/16" x 18 TPI BSF 4 items
  67. 7/16" x 20 TPI UNF 4 items
  68. 1/2" x 12 TPI BSW 4 items
  69. 1/2" x 13 TPI UNC 4 items
  70. 1/2" x 16 TPI BSF 4 items
  71. 1/2" x 20 TPI UNF 4 items
  72. 9/16" x 12 TPI BSW 3 items
  73. 9/16" x 12 TPI UNC 4 items
  74. 9/16" x 16 TPI BSF 4 items
  75. 9/16" x 18 TPI UNF 4 items
  76. 5/8" x 11 TPI BSW 3 items
  77. 5/8" x 11 TPI UNC 4 items
  78. 5/8" x 14 TPI BSF 4 items
  79. 5/8" x 18 TPI UNF 4 items
  80. 3/4" x 10 TPI UNC 4 items
  81. 3/4" x 12 TPI BSF 4 items
  82. 3/4" x 16 TPI UNF 4 items
  83. 7/8" x 9 TPI UNC 4 items
  84. 7/8" x 11 TPI BSF 4 items
  85. 7/8" x 14 TPI UNF 4 items
  86. 1" x 8 TPI UNC 4 items
  87. 1" x 10 TPI BSF 4 items
  88. 1" x 12 TPI UNF 4 items
  89. 1-1/8" x 7 TPI UNC 1 item
  90. 1-1/8" x 12 TPI UNF 1 item
  91. 1-1/4" x 7 TPI UNC 1 item
  92. 1-1/4" x 12 TPI UNF 1 item
Thread Type
  1. Metric - Coarse 88 items
  2. Metric - Fine 43 items
  3. UNC / BSW - Coarse 63 items
  4. BSW - Coarse 34 items
  5. UNF - Fine 60 items
  6. BSF - Fine 44 items
Material / Finish
  1. Carbon 114 items
  2. High Speed Steel 218 items
Type
  1. Bottoming Tap 78 items
  2. Gun Tap 13 items
  3. Intermediate Tap 79 items
  4. Taper Tap 78 items
  5. Tap Set 84 items
Brand
  1. Alpha 319 items
  2. Sutton Tools 13 items
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