STS Industrial - Bolts & Screws

 

SPIRAL FLUTE TAPS

Spiral Flute Taps are manufactured with a helical flute design to aid in chip removal and prevent loading and clogging during the tapping process. The design of the flutes lift and discharge the chips. A minimal taper on the leading end of the tap (similar to a bottom tap design) allows for threading throughout the entire length of a blind hole. These features make the Spiral Flute Tap ideal for production tapping blind holes.

Spiral Flute Taps

  • HIGH SPEED STEEL SPIRAL FLUTE TAPS:

    Made in the USA. Fast spiral flute design for more efficient chip removal.

    High Speed Steel Spiral Flute Tap

    AVAILABLE SIZES:

    SIZE

    THREAD

    LENGTH OF THREADS

    NO. OF FLUTES

    3 48   1/2 2
    3 56   1/2 2
    4 40   9/16 2
    4 48   9/16 2
    5 40   5/8 2
    5 44   5/8 2
    6 32  11/16 2
    6 40  11/16 2
    8 32   3/4 3
    8 36   3/4 3
    10 24   7/8 3
    10 32   7/8 3
    12 24 1 3
    12 28 1 3
      1/4 20 1 3
      1/4 28 1 3
      5/16 18 1  1/8 3
      5/16 24 1  1/8 3
      3/8 16 1  5/16 3
      3/8 24 1  5/16 3
      7/16 14 1  7/16 3
      7/16 20 1  7/16 3
      1/2 13 1 21/32 3
      1/2 20 1 21/32 3
      5/8 11 1 13/16 4
      3/4 10 2  1/16 4

    All dimensions are in inches.

  • NITRO MULTI-APPLICATION SPIRAL FLUTE TAPS:

    Made in the USA. These taps are designed for machine tapping operations in a wide range of material groups, including difficult to machine materials such as stainless steel. The Nitro Multi-Application Spiral Flute Tap yields improved thread quality, overall finish,  and tool life.

    Nitro Multi Application-Spiral Flute Tap

    AVAILABLE SIZES:

    INCH SIZES:

    SIZE

    THREAD

    NO. OF FLUTES

    4 40 2
    4 48 2
    5 40 3
    5 44 3
    6 32 3
    6 40 3
    8 32 3
    8 36 3
    10 24 3
    10 32 3
    12 24 3
    12 28 3
      1/4 20 3
      1/4 28 3
      5/16 18 3
      5/16 24 3
      3/8 16 3
      3/8 24 3
      7/16 14 3
      7/16 20 3
      1/2 13 3
      1/2 20 3
      9/16 12 3
      9/16 18 3
      5/8 11 4
      5/8 18 4
      3/4 10 4
      3/4 16 4
      7/8 9 4
      7/8 14 4
    1 8 4
    1 12 4

    All dimensions in inches.

    METRIC SIZES:

    SIZE

    THREAD

    NO. OF FLUTES

    3 0.50 3
    3.5 0.60 3
    4 0.70 3
    5 0.80 3
    6 1.00 3
    7 1.00 3
    8 1.25 3
    8 1.00 3
    10 1.50 3
    10 1.25 3
    12 1.75 3
    12 1.25 3
    14 2.00 3
    14 1.50 3
    16 2.00 3
    16 1.50 3
    18 2.50 4
    18 1.50 4
    20 2.50 4
    20 1.50 4
    22 2.50 4
    22 1.50 4
    24 3.00 4

    All dimensions in millimeters.

    • STANDARD TAP DRILL SIZES

      TAP SIZE

      THREAD

      DRILL SIZE

      % OF THREAD

      0 80   3/64 71-81
      1 64 53 59-67
      1 72 53 67-75
      2 56 50 62-69
      2 64 50 70-79
      3 48   5/64 70-77
      3 56 46 69-78
      4 40 43 65-71
      4 48 42 61-68
      5 40 38 65-72
      5 44 37 63-71
      6 32 36 71-78
      6 40 33 69-77
      8 32 29 62-69
      8 36 29 70-78
      10 24 25 69-75
      10 32 21 68-79
      12 24 16 66-72
      12 28 15 70-78
        1/4 20 7 70-75
        1/4 28 3 72-80
        5/16 18 F 72-77
        5/16 24 1 67-75
        3/8 16   5/16 72-77

      TAP SIZE

      THREAD

      DRILL SIZE

      % OF THREAD

        3/8 24 Q 71-79
        7/16 14 U 70-75
        7/16 20  25/64 65-72
        1/2 13  27/64 73-78
        1/2 20  29/64 65-72
        9/16 12  31/64 68-72
        9/16 18  33/64 58-65
        5/8 11  17/32 75-79
        5/8 18  37/64 58-65
        3/4 10  21/32 68-72
        3/4 16  11/16 71-77
        7/8 9  49/64 72-76
        7/8 14  13/16 62-67
      1 8   7/8 73-77
      1 12  59/64 67-75
      1 14  15/16 61-67
      1  1/8 7  63/64 72-76
      1  1/8 12 1  3/16 66-72
      1  1/4 7 1  7/64 76
      1  1/4 12 1 11/64 72
      1  3/8 6 1  7/32 72
      1  3/8 12 1 19/64 72
      1  1/2 6 1 11/32 72
      1  1/2 12 1 27/64 72

      Drill sizes shown are applicable for taps sold from STS Industrial.

    • METRIC TAP DRILL SIZES

      TAP SIZE

      THREAD

      DRILL SIZE

      % OF THREAD

      1.6 0.35 1.25 MM 69
      1.8 0.35 1.45 MM 69
      2 0.40 1.60 MM 69
        1/16 66
      2.2 0.45 1.75 MM 70
      2.5 0.45 2.05 MM 69
      46 67
      3 0.50 40 70
      3.5 0.60 33 72
      4 0.70 30 73
      4.5 0.75 3.70 MM 74
      26 70
      5 0.80 4.2 MM 69
      19 68
      5.5 0.90 4.6 MM 68
      14 67
      6 0.75 5.30 MM 74
      4 73
      6 1.00 10 71
      7 0.75 6.30 MM 74
      D 72
      7 1.00  15/64 73
      8 1.25 6.70 MM 74
      8 1.00 7.00 MM 69
      J 66

      TAP SIZE

      THREAD

      DRILL SIZE

      % OF THREAD

      9 1.25 7.75 MM 73
      10 1.50 8.40 MM 76-82
      10 1.25 8.7 MM 73
       11/32 71
      11 1.50   3/8 71
      12 1.75 10.20 MM 74
       13/32 71
      12 1.25  27/64 72
      14 2.00 15/32 76-81
      14 1.50 12.50 MM 71
      16 2.00 35/64 76-81
      18 2.50 39/64 74
      18 1.50 16.50 MM 70
      20 2.50  11/16 74-78
      22 2.50 49/64 75
      24 3.00 21.00 MM 73
      53/64 72-76
      27 3.00 24.00 MM 73
      15/16 78
      30 3.50 1  3/64 75
      33 3.50 29.50 MM 74
      1 11/64 72
      36 4.00 1  1/4 82

      Drill sizes shown are applicable for taps sold from STS Industrial.

    • PIPE THREAD TAP DRILL SIZES

      TAPER PIPE NPT

      TAP SIZE

      THREAD

      DRILL SIZE

        1/8 27 Q
        1/4 18   7/16
        3/8 18   9/16
        1/2 14  45/64
        3/4 14  29/32
      1 11  1/2 1  9/64
      1  1/4 11  1/2 1 31/64
      1  1/2 11  1/2 1 23/32
      2 11  1/2 2  3/16
      2  1/2 8 2 39/64
      3 8 3 15/64

      STRAIGHT PIPE NPS

      TAP SIZE

      THREAD

      DRILL SIZE

        1/8 27  11/32
        1/4 18   7/16
        3/8 18  37/64
        1/2 14  23/32
        3/4 14  59/64
      1 11  1/2 1  5/32
      1  1/4 11  1/2 1  1/2
      1  1/2 11  1/2 1  3/4
      2 11  1/2 2  7/32
      2  1/2 8 2 21/32
      3 8 3 15/64

      Drill sizes shown are applicable for taps sold from STS Industrial.

    • TROUBLESHOOTING

      Tap Troubleshooting Guide


Sources: Drillco Cutting Tools Product Catalog 2013, Champion Cutting Tools 2011 Product Catalog, Norseman/CTD Product Catalog 2013

Note: All material included on this page is informational only, and should not be used as one’s sole source for design purposes. STS Industrial, Inc. and its affiliates do not guarantee the accuracy of the information on this site, and retain no liability for the use or misuse of the information contained on this site.