Pipe Pulley Thread Forming
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.
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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 A58408 ACT 1/4-18 6 4 NPT HSS TIN Available to Order* $120.35 -
A77597 ACT 1-11-1/2 1.1250 (1-1/8)" 3-3/4 nan 5 nan HSS NITRIDE & STEAM OXIDE 16 $138.73 -
A58409 ACT 3/8-18 6 4 NPT HSS TIN 9 $162.90 -
A77598 ACT 1-1/4-11-1/2 1.3125 (1-5/16)" 4 nan 5 nan HSS NITRIDE & STEAM OXIDE 4 $196.06 -
A55072 ACT 1/2-14 6 4 NPT HSS Uncoated 22 $186.65 -
A58410 ACT 1/2-14 6 4 NPT HSS TIN 5 $189.13 -
A58404 ACT 1/2-14 0.6875 3-1/8 4 NPS HSS TIN 9 $128.97 -
A55067 ACT 3/4-14 0.9063 3-1/4 5 NPS HSS Uncoated 11 $128.85 -
A77605 ACT 3/4-14 0.9063 3-1/4 nan 5 nan HSS TiN 4 $117.68 -
A58405 ACT 3/4-14 0.9063 3-1/4 5 NPS HSS TIN 10 $180.37 -
A55068 ACT 1-11-1/2 1.125 3-3/4 5 NPS HSS Uncoated 23 $195.92 -
A58406 ACT 1-11-1/2 1.125 3-3/4 5 NPS HSS TIN 3 $152.06 -
A58396 ACT 3/4-14 0.9063 3-1/4 5 NPTF Dryseal - Interrupted HSS TIN 7 $149.88 -
A54811 ACT 5/8-11 0.633 8 H3 4 Pulley HSS Uncoated 8 $126.08 -
A55010 ACT 3/4-14 0.9063 3-1/4 5 NPT - Interrupted HSS Uncoated 45 $125.63 -
A57651 ACT 3/4-14 0.9063 3-1/4 5 NPT - Interrupted HSS STEAM OXIDE 24 $133.55 -
A55032 ACT 1-1/4-11-1/2 1.3125 4 5 NPTF Dryseal HSS Uncoated 21 $192.29 -
A54813 ACT 5/8-11 0.633 12 H3 4 Pulley HSS Uncoated 15 $134.21 -
A58388 ACT 1-1/4-11-1/2 1.3125 4 5 NPTF Dryseal HSS TIN Available to Order* $151.69 -
A57652 ACT 3/4-14 0.9063 3-1/4 5 NPT - Interrupted HSS TIN 11 $151.98 -
A54814 ACT 3/4-10 0.759 10 H3 4 Pulley HSS Uncoated 21 $185.32 -
A55033 ACT 1-1/2-11-1/2 1.5 4-1/4 7 NPTF Dryseal HSS Uncoated 2 $186.81 -
A55011 ACT 1-11-1/2 1.125 3-3/4 5 NPT - Interrupted HSS Uncoated 35 $190.07 -
A54815 ACT 3/4-10 0.759 12 H3 4 Pulley HSS Uncoated 9 $159.85 -
A58389 ACT 1-1/2-11-1/2 1.5 4-1/4 7 NPTF Dryseal HSS TIN 1 $200.26 -
A57653 ACT 1-11-1/2 1.125 3-3/4 5 NPT - Interrupted HSS STEAM OXIDE 16 $204.34 -
A55059 ACT 5/8-11 0.48 6 H3 NC .360 9/16 1-13/16 3 Spiral Point Plug HSS Uncoated Available to Order* $128.68 -
A55060 ACT 5/8-18 0.48 6 H3 NF .360 9/16 1-13/16 3 Spiral Point Plug HSS Uncoated 25 $128.68 -
A54992 ACT 1-11-1/2 1.125 3-3/4 5 NPT HSS Uncoated 51 $123.28 -
A77416 ACT 5/8-11 0.4800 6 H3 3 SP/PT Plug HSS ALTiN 9 $145.26 -
A57634 ACT 1-11-1/2 1.125 3-3/4 5 NPT HSS TIN 13 $147.11 -
A77417 ACT 5/8-18 0.4800 6 H3 3 SP/PT Plug HSS ALTiN 7 $135.47 -
A57633 ACT 1-11-1/2 1.125 3-3/4 5 NPT HSS STEAM OXIDE 18 $133.37 -
A55061 ACT 3/4-10 0.59 6 H3 NC .442 11/16 2 3 Spiral Point Plug HSS Uncoated 37 $166.98 -
A54993 ACT 1-1/4-11-1/2 1.3125 4 5 NPT HSS Uncoated 38 $174.78 -
A57636 ACT 1-1/4-11-1/2 1.3125 4 5 NPT HSS TIN 12 $212.33 -
A55062 ACT 3/4-16 0.59 6 H3 NF .442 11/16 2 3 Spiral Point Plug HSS Uncoated 16 $166.98 -
A77418 ACT 3/4-10 0.5900 6 H3 3 SP/PT Plug HSS ALTiN 7 $173.80 -
A57635 ACT 1-1/4-11-1/2 1.3125 4 5 NPT HSS STEAM OXIDE 19 $187.89 -
A77419 ACT 3/4-16 0.5900 6 H3 3 SP/PT Plug HSS ALTiN 9 $173.80
* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.