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 26

• Alfa Tool 3/8-24 HSS Usa Spiral Pointed Tap SKU SPT170133 $9.50
• Alfa Tool 30 X 1.5mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271056 $154.52
• Alfa Tool 30 X 2.50mm HSS Bottoming Metric Tap SKU HSMTB72106 $199.14
• Alfa Tool 30 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72107 $199.14
• Milwaukee 300 MCM Aluminum U Styledie SKU 495-49-16-U300 $122.20
• DeWalt 300 MCM Aluminum U-Die Set SKU 115-DCE310300AL $192.29
• Milwaukee 300 MCM Copper U Style Die SKU 495-49-16-U300C $122.20
• DeWalt 300 MCM Copper U-Die Set SKU 115-DCE3100300CU $192.29
• Alfa Tool 30mm - 2.00mm Carbon Steel Metric Hand Tap Bottoming SKU CSMTB70846 $54.70
• Alfa Tool 30mm - 3.50mm Carbon Steel Metric Hand Tap Bottoming SKU CSMTB70847 $54.70
• Approved Vendor 31/32" HSS Spiral Flute Hand Reamer SKU 23410 $111.06
• Approved Vendor 31/32" HSS Straight Shank Spiral Flute Chucking Reamer SKU 23414 $70.73
• Alfa Tool 32 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72108 $205.10
• Alfa Tool 32 X 2.0mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271057 $159.10
• Alfa Tool 33 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72110 $205.10
• Alfa Tool 33 X 2.0mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271059 $159.10
• DeWalt 350 MCM Aluminum U-Die Set SKU 115-DCE310350AL $192.29
• DeWalt 350 MCM Copper U-Die Set SKU 115-DCE3100350CU $192.29
• Alfa Tool 39 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72115 $296.98
• DeWalt 4 Aluminum U-Die Set SKU 115-DCE31004AL $192.29
• Alfa Tool 4 X 0.7mm HS Usa Spiral Pointed Tap SKU SPTM170158 $9.76
• Alfa Tool 4" - 8 Carbon Steel Rethreading Hex Die SKU CSRTD70770 $498.96
• Alfa Tool 4-36 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170008A $8.94
• Alfa Tool 4-36 HSS Alfa Usa Hand Tap-Taper SKU HTT170008A $8.94
• Alfa Tool 4-36 HSS Usa Spiral Pointed Tap SKU SPT170108A $8.98
• Milwaukee 4-36 NS 1-Inch Hex Threading Die SKU 495-49-57-5307 $7.90
• Alfa Tool 4-40 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170907 $17.82
• Alfa Tool 4-40 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170907 $17.82
• Alfa Tool 4-40 HSS Eco Pro Hand Tap-Bottoming SKU HTB270007 $5.98
• Alfa Tool 4-40 HSS Hand Tap .005 Oversize SKU HTO71407 $8.18
• Alfa Tool 4-40 HSS Usa Spiral Pointed Tap SKU SPT170107 $8.70
• Milwaukee 4-40 NC 1-Inch Hex Threading Die SKU 495-49-57-5308 $7.90
• Alfa Tool 4-48 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170008 $8.26
• Alfa Tool 4-48 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170908 $17.82
• Alfa Tool 4-48 HSS Eco Pro Hand Tap-Bottoming SKU HTB270008 $5.98
• Alfa Tool 4-48 HSS Eco Pro Hand Tap-Taper SKU HTT270008 $5.98
• Alfa Tool 4-48 HSS Eco Spiral Pointed Tap SKU SPT270108 $7.32
• Alfa Tool 4-48 HSS Usa Spiral Pointed Tap SKU SPT170108 $8.98
• Alfa Tool 4.5 X 0.75mm HS Usa Spiral Pointed Tap SKU SPTM170159 $9.76
• DeWalt 4/0 Aluminum U-Die Set SKU 115-DCE310040AL $192.29/pack of 4
• DeWalt 4/0 Copper U-Die Set SKU 115-DCE310040CU $192.29/pack of 4
• Irwin 40-PC Mach Screw/Fract Plug Tap/1" Hex Die Set SKU 585-1835091 $458.40
• Irwin 40-PC Machine Screw & Metric Plug Tap & Die Set SKU 585-1835092 $458.40
• Milwaukee 400 MCM Aluminum 6T U Style Die SKU 495-49-16-U400 $203.45
• Milwaukee 400 MCM Copper U Style Die SKU 495-49-16-U400C $122.20
• DeWalt 400 MCM Copper U-Die Set SKU 115-DCE3100400CU $192.29
• Irwin 41-PC Machine Screw/Frac/Met Self Align Tap Set SKU 585-1840235 $613.85
• Alfa Tool 42 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72118 $332.08

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