Pipe Pulley Thread Forming

Pipe Pulley Thread Forming

Taper Pipe NPT - For Cast Iron
Taper Pipe NPT - For Cast Iron
Taper Pipe NPT - Spiral Flute
Taper Pipe NPT - Spiral Flute
Thread Forming
Thread Forming
Extension Taper Pipe NPT
Extension Taper Pipe NPT
Pulley Tap
Pulley Tap
Small Shank Extension - Spiral Point Plug
Small Shank Extension - Spiral Point Plug
Straight Pipe - NPS
Straight Pipe - NPS
Taper Pipe - NPTF Dryseal
Taper Pipe - NPTF Dryseal
Taper Pipe - NPTF Dryseal - Interrupted
Taper Pipe - NPTF Dryseal - Interrupted
Taper Pipe NPT
Taper Pipe NPT
Taper Pipe NPT - Interrupted
Taper Pipe NPT - Interrupted

A collection of specialized HSS tap styles for pipe threading, pulley set-screw applications, and chipless thread forming. Available in NPT, NPTF Dryseal, NPS, NC, and NF thread standards.

Thread Forming: Rather than cutting material away, thread forming taps displace it, cold-forming the thread into the hole wall. This produces a stronger thread with no chips to evacuate — ideal for ductile materials and ensures no chip-related jams in blind holes.

Pipe Taps (NPT/NPTF/NPS): Tapered pipe taps cut threads that seal on the taper itself, standard for plumbing and fluid-fitting connections. NPTF Dryseal variants seal without additional sealant; interrupted-thread versions reduce torque and improve chip control in deeper holes.

Pulley Taps: Designed specifically for the shallow, often through-drilled holes used in set-screw applications on pulleys and hubs.

  • Compare SKU Vendor Size Shank Diameter Overall Length H Limit D Limit NC / NF Square Size Square Length Thread Length Number of Lube Grooves Number of Flutes Style Material Coating In Stock Price Quantity
    A77592 ACT 1/8-27 0.4375 (7/16)" 2-1/8 nan 4 nan HSS NITRIDE & STEAM OXIDE 23
    $29.02
  • A77586 ACT 1/8-27 0.4375 (7/16)" 2-1/8 nan 4 nan HSS Uncoated 22
    $47.20
  • A55069 ACT 1/8-27 6 4 NPT HSS Uncoated 24
    $74.96
  • A55063 ACT 1/8-27 0.4375 2-1/8 4 NPS HSS Uncoated 100
    $39.95
  • A55049 ACT 1/4-20 0.185 6 H3 NC .139 5/16 1 2 Spiral Point Plug HSS Uncoated 4
    $72.82
  • A55035 ACT 1/8-27 0.3125 2-1/8 5 NPTF Dryseal - Interrupted HSS Uncoated 100
    $42.72
  • A55024 ACT 1/16-27 0.3125 2-1/8 4 NPTF Dryseal HSS Uncoated 17
    $27.37
  • A55005 ACT 1/8-27 0.3125 2-1/8 5 NPT - Interrupted HSS Uncoated 32
    $38.64
  • A54985 ACT 1/16-27 0.3125 2-1/8 4 NPT HSS Uncoated 88
    $24.78
  • A54816 ACT 0-80 0.141 1-5/8 H2 0 Bottoming HSS TiN 19
    $25.23
  • A54797 ACT 1/4-20 0.255 6 H3 4 Pulley HSS Uncoated 7
    $57.27
  • A77601 ACT 1/8-27 0.4375 (7/16)" 2-1/8 nan 4 nan HSS TiN 17
    $51.91
  • A77593 ACT 1/4-18 0.5625 (9/16)" 2-7/16 nan 4 nan HSS NITRIDE & STEAM OXIDE 44
    $32.61
  • A58407 ACT 1/8-27 6 4 NPT HSS TIN 10
    $104.43
  • A58401 ACT 1/8-27 0.4375 2-1/8 4 NPS HSS TIN 17
    $55.70
  • A58391 ACT 1/8-27 0.3125 2-1/8 5 NPTF Dryseal - Interrupted HSS TIN 5
    $59.41
  • A58380 ACT 1/16-27 0.3125 2-1/8 4 NPTF Dryseal HSS TIN 10
    $38.26
  • A57641 ACT 1/8-27 0.3125 2-1/8 5 NPT - Interrupted HSS STEAM OXIDE 52
    $40.62
  • A57620 ACT 1/16-27 0.3125 2-1/8 4 NPT HSS TIN 19
    $30.67
  • A55050 ACT 1/4-28 0.185 6 H3 NF .139 5/16 1 2 Spiral Point Plug HSS Uncoated 16
    $72.82
  • A54817 ACT 0-80 0.141 1-5/8 H3 0 Bottoming HSS TiN 16
    $25.23
  • A54798 ACT 1/4-20 0.255 8 H3 4 Pulley HSS Uncoated 7
    $70.84
  • A77594 ACT 3/8-18 0.7000 2-9/16 nan 4 nan HSS NITRIDE & STEAM OXIDE 6
    $39.84
  • A77587 ACT 1/4-18 0.5625 (9/16)" 2-7/16 nan 4 nan HSS Uncoated 75
    $52.20
  • A77406 ACT 1/4-20 0.1850 6 H3 2 SP/PT Plug HSS ALTiN 17
    $74.57
  • A77205 ACT 0-80 0.1410 1-5/8 H2 None Single Thread HSS Uncoated 24
    $19.93
  • A57642 ACT 1/8-27 0.3125 2-1/8 5 NPT - Interrupted HSS TIN 14
    $46.88
  • A57619 ACT 1/16-27 0.3125 2-1/8 4 NPT HSS STEAM OXIDE 19
    $26.88
  • A55070 ACT 1/4-18 6 4 NPT HSS Uncoated Available to Order*
    $85.92
  • A55064 ACT 1/4-18 0.5625 2-7/16 4 NPS HSS Uncoated 20
    $43.96
  • A55036 ACT 1/8-27 0.4375 2-1/8 5 NPTF Dryseal - Interrupted HSS Uncoated 37
    $42.72
  • A55025 ACT 1/8-27 0.3125 2-1/8 4 NPTF Dryseal HSS Uncoated 20
    $27.37
  • A54799 ACT 5/16-18 0.318 6 H3 4 Pulley HSS Uncoated 40
    $60.69
  • A77602 ACT 1/4-18 0.5625 (9/16)" 2-7/16 nan 4 nan HSS TiN 22
    $58.80
  • A77595 ACT 1/2-14 0.6875 (11/16)" 3-1/8 nan 4 nan HSS NITRIDE & STEAM OXIDE 10
    $65.93
  • A77407 ACT 1/4-28 0.1850 6 H3 2 SP/PT Plug HSS ALTiN 12
    $74.57
  • A77336 ACT 0-80 0.1410 1-5/8 H2 None Bottom HSS Uncoated 51
    $19.93
  • A58402 ACT 1/4-18 0.5625 2-7/16 4 NPS HSS TIN 6
    $61.69
  • A58392 ACT 1/8-27 0.4375 2-1/8 5 NPTF Dryseal - Interrupted HSS TIN 4
    $50.91
  • A58381 ACT 1/8-27 0.3125 2-1/8 4 NPTF Dryseal HSS TIN 6
    $38.26
  • A55006 ACT 1/8-27 0.4375 2-1/8 5 NPT - Interrupted HSS Uncoated 59
    $38.64
  • A54986 ACT 1/8-27 0.3125 2-1/8 4 NPT HSS Uncoated 100
    $24.78
  • A54800 ACT 5/16-18 0.318 8 H3 4 Pulley HSS Uncoated 21
    $72.90
  • A77596 ACT 3/4-14 0.9063 3-1/4 nan 5 nan HSS NITRIDE & STEAM OXIDE 8
    $86.47
  • A77588 ACT 3/8-18 0.7000 2-9/16 nan 4 nan HSS Uncoated 75
    $60.26
  • A77337 ACT 0-80 0.1410 1-5/8 H3 None Bottom HSS Uncoated 10
    $19.93
  • A57643 ACT 1/8-27 0.4375 2-1/8 5 NPT - Interrupted HSS STEAM OXIDE 17
    $41.44
  • A57622 ACT 1/8-27 0.3125 2-1/8 4 NPT HSS TIN 35
    $30.67
  • A55071 ACT 3/8-18 6 4 NPT HSS Uncoated 22
    $116.80
  • A55065 ACT 3/8-18 0.7 2-9/16 4 NPS HSS Uncoated 12
    $57.80
  • A55051 ACT 5/16-18 0.24 6 H3 NC .180 3/8 1-1/8 2 Spiral Point Plug HSS Uncoated 9
    $76.77
  • A55037 ACT 1/4-18 0.5625 2-7/16 5 NPTF Dryseal - Interrupted HSS Uncoated 58
    $47.08
  • A55026 ACT 1/8-27 0.4375 2-1/8 4 NPTF Dryseal HSS Uncoated 10
    $27.37
  • A54801 ACT 3/8-16 0.381 6 H3 4 Pulley HSS Uncoated 39
    $67.95
  • A77603 ACT 3/8-18 0.7000 2-9/16 nan 4 nan HSS TiN 18
    $67.54
  • A77448 ACT 0-80 0.1410 1-5/8 H2 None Single Thread HSS TiN 22
    $23.56
  • A58403 ACT 3/8-18 0.7 2-9/16 4 NPS HSS TIN 12
    $66.71
  • A58393 ACT 1/4-18 0.5625 2-7/16 5 NPTF Dryseal - Interrupted HSS TIN 18
    $58.01
  • A58382 ACT 1/8-27 0.4375 2-1/8 4 NPTF Dryseal HSS TIN 10
    $38.26
  • A57644 ACT 1/8-27 0.4375 2-1/8 5 NPT - Interrupted HSS TIN 43
    $46.88
  • A57621 ACT 1/8-27 0.3125 2-1/8 4 NPT HSS STEAM OXIDE 27
    $26.88
  • A55052 ACT 5/16-24 0.24 6 H3 NF .180 3/8 1-1/8 2 Spiral Point Plug HSS Uncoated 21
    $76.77
  • A54802 ACT 3/8-16 0.381 8 H3 4 Pulley HSS Uncoated 15
    $81.26
  • A77589 ACT 1/2-14 0.6875 (11/16)" 3-1/8 nan 4 nan HSS Uncoated 36
    $81.93
  • A77449 ACT 0-80 0.1410 1-5/8 H3 None Single Thread HSS TiN 8
    $23.56
  • A77408 ACT 5/16-18 0.2400 6 H3 2 SP/PT Plug HSS ALTiN 12
    $79.56
  • A55066 ACT 1/2-14 0.6875 3-1/8 4 NPS HSS Uncoated 12
    $92.61
  • A55038 ACT 3/8-18 0.7 2-9/16 5 NPTF Dryseal - Interrupted HSS Uncoated 35
    $43.17
  • A55027 ACT 1/4-18 0.5625 2-7/16 4 NPTF Dryseal HSS Uncoated 76
    $30.26
  • A55007 ACT 1/4-18 0.5625 2-7/16 5 NPT - Interrupted HSS Uncoated 100
    $42.88
  • A54987 ACT 1/8-27 0.4375 2-1/8 4 NPT HSS Uncoated 100
    $24.78
  • A54803 ACT 3/8-16 0.381 10 H3 4 Pulley HSS Uncoated 4
    $102.09
  • A77604 ACT 1/2-14 0.6875 (11/16)" 3-1/8 nan 4 nan HSS TiN 3
    $90.00
  • A77409 ACT 5/16-24 0.2400 6 H3 2 SP/PT Plug HSS ALTiN 17
    $79.56
  • A58394 ACT 3/8-18 0.7 2-9/16 5 NPTF Dryseal - Interrupted HSS TIN 13
    $72.82
  • A58383 ACT 1/4-18 0.5625 2-7/16 4 NPTF Dryseal HSS TIN 12
    $42.47
  • A57645 ACT 1/4-18 0.5625 2-7/16 5 NPT - Interrupted HSS STEAM OXIDE 45
    $46.55
  • A57624 ACT 1/8-27 0.4375 2-1/8 4 NPT HSS TIN 24
    $33.06
  • A54852 ACT 1/4-20 0.255 2-1/2 H3 2 Bottoming HSS TiN 29
    $20.46
  • A54804 ACT 7/16-14 0.444 6 H3 4 Pulley HSS Uncoated 7
    $51.87
  • A77590 ACT 3/4-14 0.9063 3-1/4 nan 5 nan HSS Uncoated 21
    $106.42
  • A57646 ACT 1/4-18 0.5625 2-7/16 5 NPT - Interrupted HSS TIN 42
    $53.89
  • A57623 ACT 1/8-27 0.4375 2-1/8 4 NPT HSS STEAM OXIDE 24
    $27.50
  • A55053 ACT 3/8-16 0.275 6 H3 NC .206 7/16 1-1/4 3 Spiral Point Plug HSS Uncoated 9
    $82.71
  • A55039 ACT 1/2-14 0.6875 3-1/8 5 NPTF Dryseal - Interrupted HSS Uncoated 21
    $68.69
  • A55028 ACT 3/8-18 0.7 2-9/16 4 NPTF Dryseal HSS Uncoated 18
    $39.83
  • A54853 ACT 1/4-20 0.255 2-1/2 H4 2 Bottoming HSS TiN 10
    $20.46
  • A54805 ACT 7/16-14 0.444 8 H3 4 Pulley HSS Uncoated 3
    $67.82
  • A58395 ACT 1/2-14 0.6875 3-1/8 5 NPTF Dryseal - Interrupted HSS TIN 5
    $102.92
  • A58384 ACT 3/8-18 0.7 2-9/16 4 NPTF Dryseal HSS TIN 4
    $55.78
  • A55054 ACT 3/8-24 0.275 6 H3 NF .206 7/16 1-1/4 3 Spiral Point Plug HSS Uncoated 10
    $82.71
  • A55008 ACT 3/8-18 0.7 2-9/16 5 NPT - Interrupted HSS Uncoated 15
    $54.01
  • A54988 ACT 1/4-18 0.5625 2-7/16 4 NPT HSS Uncoated 86
    $27.58
  • A54855 ACT 1/4-28 0.255 2-1/2 H4 2 Bottoming HSS TiN 21
    $20.46
  • A54806 ACT 1/2-13 0.507 6 H3 4 Pulley HSS Uncoated 81
    $72.90
  • A77410 ACT 3/8-16 0.2750 6 H3 3 SP/PT Plug HSS ALTiN 11
    $93.41
  • A57647 ACT 3/8-18 0.7 2-9/16 5 NPT - Interrupted HSS STEAM OXIDE 23
    $58.35
  • A57626 ACT 1/4-18 0.5625 2-7/16 4 NPT HSS TIN 16
    $36.54
  • A55040 ACT 3/4-14 0.9063 3-1/4 5 NPTF Dryseal - Interrupted HSS Uncoated 22
    $100.07
  • A55029 ACT 1/2-14 0.6875 3-1/8 4 NPTF Dryseal HSS Uncoated 23
    $63.71

* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.

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