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 29

• Approved Vendor 5/8"-20 UNS Carbon Steel Hex Die SKU 25999 $40.26
• Approved Vendor 5/8"-20 UNS HSS Plug Tap SKU 26000 $27.28
• Approved Vendor 5/8"-20 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 26001 $51.96
• Approved Vendor 5/8"-24 UNS Carbon Steel Hex Die SKU 26002 $40.26
• Approved Vendor 5/8"-24 UNS HSS Plug Tap SKU 26003 $27.28
• Approved Vendor 5/8"-24 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 26004 $51.96
• Approved Vendor 5/8"-27 UNS HSS Plug Tap SKU 26005 $27.28
• Approved Vendor 5/8"-27 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 26006 $51.96
• Approved Vendor 5/8"-28 UNS HSS Plug Tap SKU 26007 $27.28
• Approved Vendor 5/8"-28 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 26008 $51.96
• Approved Vendor 5/8"-32 UNS Carbon Steel Hex Die SKU 26010 $40.26
• Approved Vendor 5/8"-32 UNS HSS Plug Tap SKU 26011 $27.28
• Approved Vendor 5/8"-32 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 26012 $51.96
• Approved Vendor 5/8"-40 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 26013 $51.96
• Alfa Tool 5/8-11 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170942 $59.80
• Alfa Tool 5/8-11 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170942 $59.80
• Alfa Tool 5/8-11 HSS Combination Drill Tap 1/4 Shank SKU DTML66117 $58.98
• Alfa Tool 5/8-11 HSS Eco Pro Hand Tap-Bottoming SKU HTB270042 $22.42
• Alfa Tool 5/8-11 HSS Eco Pro Hand Tap-Taper SKU HTT270042 $22.42
• Alfa Tool 5/8-11 HSS Eco Spiral Pointed Tap SKU SPT270140 $27.66
• Alfa Tool 5/8-11 HSS Screw Thread Insert Taps SKU ST66542 $74.24
• Alfa Tool 5/8-11 HSS Usa Spiral Pointed Tap SKU SPT170140 $33.66
• Alfa Tool 5/8-11 Multi Purpose Spiral Pointed Tap SKU HPMP90142 $77.68
• Alfa Tool 5/8-18 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170043 $33.12
• Alfa Tool 5/8-18 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170943 $59.80
• Alfa Tool 5/8-18 HSS Black Oxide Alfa Usa Hand Tap Set SKU HTS80043 $102.34
• Alfa Tool 5/8-18 HSS Eco Pro Hand Tap-Bottoming SKU HTB270043 $22.42
• Alfa Tool 5/8-18 HSS Eco Pro Hand Tap-Taper SKU HTT270043 $22.42
• Alfa Tool 5/8-18 HSS Hand Tap .005 Oversize SKU HTO71443 $28.20
• Alfa Tool 5/8-18 HSS Screw Thread Insert Taps SKU ST66542A $74.24
• Alfa Tool 5/8-18 HSS Usa Spiral Pointed Tap SKU SPT170141 $33.66
• Alfa Tool 5/8-18 Multi Purpose Spiral Fluted Tap SKU HPMP70943 $83.56
• Alfa Tool 5/8-18 Multi Purpose Spiral Pointed Tap SKU HPMP90143 $77.68
• Alfa Tool 50 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72127 $428.76
• Alfa Tool 50 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72128 $428.76
• Milwaukee 500 MCM Aluminum 6T U Style Die SKU 495-49-16-U500 $203.45
• DeWalt 500 MCM Copper U-Die Set SKU 115-DCE3100500CU $192.29
• Alfa Tool 52 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72129 $428.76
• Alfa Tool 52 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72130 $428.76
• Alfa Tool 52 X 5.00mm HSS Bottoming Metric Tap SKU HSMTB72131 $392.60
• Alfa Tool 5X0.8mm HS Usa Spiral Pointed Tap SKU SPTM170160 $10.18
• DeWalt 6 Copper U-Die Set SKU 115-DCE31006CU $192.29
• Alfa Tool 6 X 0.75mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271021 $6.24
• Alfa Tool 6 X 1.0 HS Usa Spiral Pointed Tap SKU SPTM170161 $9.86
• Alfa Tool 6-32 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170911 $14.08
• Alfa Tool 6-32 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170911 $14.08
• Alfa Tool 6-32 HSS Combination Drill Tap 1/4 Hex Shank SKU DTML66103 $21.54
• Alfa Tool 6-32 HSS Hand Tap .005 Oversize SKU HTO71411 $6.12

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