Taps & Dies

2,000+ products

Expected delivery: Wed, Nov 18

Taps cut internal threads and dies cut external threads. Maintenance techs use them to repair stripped holes and chase damaged threads, and machine shops use them in production. This section covers hand taps in taper, plug and bottoming styles, spiral point (gun) taps for through holes, spiral flute taps for blind holes, NPT pipe taps, thread-forming taps, round adjustable dies, hex rethreading dies, tap wrenches, die stocks and tap and die sets. Threads include UNC, UNF, metric and NPT.

What to check before you order

• Thread size and pitch. Confirm the exact size, for example 1/4"-20 or M6 x 1.0. Our thread sizes guide explains the callouts.
• Hole type. Spiral point taps push chips forward and suit through holes. Spiral flute taps pull chips out and suit blind holes.
• Tap drill. Drill the correct tap drill size first. Too small a hole is a common cause of broken taps.
• Material. HSS taps cover most work. Cobalt or coated taps help in stainless and tougher alloys. Always use tapping fluid in steel.
• Pipe threads. NPT taps are tapered, so tap depth controls the fit.

Common questions

What size drill do I need for a 1/4-20 tap?

A #7 drill is the common choice for about 75 percent thread engagement in a 1/4"-20 hole.

See drill bits, the Alfa Tool line, and all cutting tools.

Taps & Dies: page 20

• Alfa Tool 25 X 1.00mm HSS Bottoming Metric Tap SKU HSMTB72094 $157.60
• Alfa Tool 25 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72095 $157.60
• Approved Vendor 25/32" HSS Spiral Flute Hand Reamer SKU 19699 $82.77
• Milwaukee 250 MCM Aluminum U Styledie SKU 495-49-16-U250 $122.20
• DeWalt 250 MCM Aluminum U-Die Set SKU 115-DCE310250AL $192.29
• Milwaukee 250 MCM Copper U Style Die SKU 495-49-16-U250C $122.20
• DeWalt 250 MCM Copper U-Die Set SKU 115-DCE3100250CU $192.29
• Alfa Tool 26 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72098 $157.60
• Alfa Tool 27 X 1.00mm HSS Bottoming Metric Tap SKU HSMTB72100 $157.60
• Alfa Tool 27 X 2.0mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271053 $111.16
• Approved Vendor 27/32" HSS Spiral Flute Hand Reamer SKU 19806 $89.97
• Alfa Tool 28 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72102 $199.14
• Alfa Tool 28 X 2.00mm HSS Bottoming Metric Tap SKU HSMTB72103 $199.14
• Approved Vendor 29/32" HSS Spiral Flute Hand Reamer SKU 19913 $100.85
• Irwin 2PC Adjustable Tap Socket SKU 585-3095001 $75.06/pack of 2
• Alfa Tool 3 X 0.5mm HS Usa Spiral Pointed Tap SKU SPTM170156 $10.42
• Approved Vendor 3" NPT Carbon Steel Pipe Tap SKU 20020 $428.50
• Approved Vendor 3" NPT HSS Pipe Tap, Qualtech SKU 20021 $1,009.07
• Approved Vendor 3" X 5" Carbon Steel Square NPT Pipe Die SKU 20026 $190.02
• Approved Vendor 3"-1/2-8 NPT Carbon Steel Hex Pipe Die SKU 20027 $886.31
• Approved Vendor 3"-12 UNS Carbon Steel Hex Die SKU 20028 $397.85
• Approved Vendor 3"-12 UNS HSS Plug Tap SKU 20029 $884.02
• Approved Vendor 3"-8 NPT Carbon Steel Hex Pipe Die SKU 20030 $580.65
• Approved Vendor 3"-8 UNS Carbon Steel Hex Die SKU 20031 $378.38
• Approved Vendor 3"-8 UNS HSS Plug Tap SKU 20032 $757.29
• Alfa Tool 3-1/2 - 8 Carbon Steel Rethreading Hex Die SKU CSRTD70768 $373.72
• Approved Vendor 3-1/2 NPT Carbon Steel Pipe Tap SKU 20034 $781.90
• Approved Vendor 3-1/2 NPT HSS Pipe Tap, Qualtech SKU 20035 $1,252.47
• Approved Vendor 3-1/2"-8 UNS Carbon Steel Hex Die 8 Pitch SKU 20040 $504.51
• Approved Vendor 3-1/2"-8 UNS HSS Plug Tap SKU 20041 $1,078.98
• Alfa Tool 3-1/2-12 HSS Special Thread Tap Bottoming SKU HTSPB71544 $947.82
• Alfa Tool 3-1/4 - 8 Carbon Steel Rethreading Hex Die SKU CSRTD70767 $373.72
• Approved Vendor 3-1/4"-8 UNS Carbon Steel Hex Die 8 Pitch SKU 20045 $450.47
• Approved Vendor 3-1/4"-8 UNS HSS Plug Tap SKU 20046 $938.81
• Approved Vendor 3-1/8"-8 UNS HSS Plug Tap SKU 20050 $880.62
• Alfa Tool 3-12 HSS Special Thread Tap Bottoming SKU HTSPB71537 $665.48
• Alfa Tool 3-3/4 Eight Pitch Hex Die SKU CSRTD70769 $431.58
• Approved Vendor 3-3/4"-8 UNS Carbon Steel Hex Die 8 Pitch SKU 20060 $558.57
• Approved Vendor 3-3/4"-8 UNS HSS Plug Tap SKU 20061 $1,279.92
• Approved Vendor 3-3/8"-8 UNS HSS Plug Tap SKU 20065 $1,040.68
• Alfa Tool 3-48 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170005 $10.30
• Alfa Tool 3-48 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170905 $21.30
• Alfa Tool 3-48 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170905 $21.30
• Alfa Tool 3-48 HSS Eco Pro Hand Tap-Bottoming SKU HTB270005 $7.24
• Alfa Tool 3-48 HSS Eco Pro Hand Tap-Taper SKU HTT270005 $7.24
• Alfa Tool 3-48 HSS Eco Spiral Pointed Tap SKU SPT270105 $8.90
• Alfa Tool 3-48 HSS Usa Spiral Pointed Tap SKU SPT170105 $9.64
• Approved Vendor 3-5/8"-8 UNS HSS Plug Tap SKU 20074 $1,242.74

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