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 27

• Alfa Tool 42 X 4.50mm HSS Bottoming Metric Tap SKU HSMTB72119 $304.04
• Alfa Tool 45 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72120 $411.98
• Alfa Tool 45 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72121 $411.98
• Alfa Tool 45 X 4.50mm HSS Bottoming Metric Tap SKU HSMTB72122 $377.16
• Alfa Tool 48 X 1.50mm HSS Bottoming Metric Tap SKU HSMTB72123 $416.16
• Alfa Tool 48 X 3.00mm HSS Bottoming Metric Tap SKU HSMTB72124 $416.16
• Alfa Tool 48 X 4.50mm HSS Bottoming Metric Tap SKU HSMTB72125 $416.16
• Alfa Tool 48 X 5.00mm HSS Bottoming Metric Tap SKU HSMTB72126 $416.16
• Alfa Tool 5-40 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170009 $7.72
• Alfa Tool 5-40 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170909 $17.82
• Alfa Tool 5-40 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170909 $17.82
• Alfa Tool 5-40 HSS Eco Pro Hand Tap-Bottoming SKU HTB270009 $5.98
• Alfa Tool 5-40 HSS Eco Pro Hand Tap-Taper SKU HTT270009 $5.98
• Alfa Tool 5-40 HSS Eco Spiral Pointed Tap SKU SPT270109 $7.32
• Alfa Tool 5-40 HSS Hand Tap .005 Oversize SKU HTO71409 $8.18
• Alfa Tool 5-40 HSS Usa Spiral Pointed Tap SKU SPT170109 $8.70
• Alfa Tool 5-44 HSS Alfa Usa Hand Tap-Bottoming SKU HTB170010 $8.26
• Alfa Tool 5-44 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170910 $17.82
• Alfa Tool 5-44 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170910 $17.82
• Alfa Tool 5-44 HSS Eco Pro Hand Tap-Bottoming SKU HTB270010 $5.98
• Alfa Tool 5-44 HSS Eco Pro Hand Tap-Taper SKU HTT270010 $5.98
• Alfa Tool 5-44 HSS Usa Spiral Pointed Tap SKU SPT170110 $8.98
• Milwaukee 5/16"-18 NC 1-Inch Hex Threading Die SKU 495-49-57-5342 $9.25
• Milwaukee 5/16"-24 NF 1-Inch Hex Threading Die SKU 495-49-57-5344 $9.25
• Alfa Tool 5/16-18 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170932 $19.36
• Alfa Tool 5/16-18 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170932 $19.36
• Alfa Tool 5/16-18 HSS Combination Drill Tap 1/4 Shank SKU DTML66109 $26.52
• Alfa Tool 5/16-24 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170933 $19.36
• Alfa Tool 5/16-24 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170933 $19.36
• Alfa Tool 5/16-24 HSS Combination Drill Tap 1/4 Shank SKU DTML66110 $26.52
• Approved Vendor 5/32"-32 UNS HSS Plug Tap SKU 25459 $18.02
• Approved Vendor 5/32"-32 UNS X 1" OD HSS Round Adjustable Die SKU 25460 $33.01
• Approved Vendor 5/32"-32 UNS X 13/16" OD HSS Round Adjustable Die SKU 25461 $29.07
• Approved Vendor 5/32"-36 UNS X 13/16" OD HSS Round Adjustable Die SKU 25462 $29.07
• Approved Vendor 5/8" HSS 2MT Spiral Flute Bridge Reamer SKU 25606 $50.29
• Approved Vendor 5/8" HSS Spiral Flute Hand Expansion Reamer SKU 25619 $190.69
• Approved Vendor 5/8" HSS Spiral Flute Hand Reamer SKU 25620 $64.12
• Approved Vendor 5/8" Long Lag Shield Anchor Die Cast Zinc Alloy SKU 25632 $7.24
• Approved Vendor 5/8" Short Lag Shield Anchor Die Cast Zinc Alloy SKU 25646 $5.17
• Approved Vendor 5/8"-11 Carbon Steel Hex Rethreading Die SKU 25771 $17.44
• Approved Vendor 5/8"-11 Carbon Steel Square Bolt Die SKU 25773 $87.19
• Approved Vendor 5/8"-11 HSS Machine and Fraction Hand Bottoming Tap SKU 25801 $38.73
• Approved Vendor 5/8"-11 HSS Machine and Fraction Hand Plug Tap SKU 25802 $38.73
• Approved Vendor 5/8"-11 HSS Machine and Fraction Hand Taper Tap SKU 25803 $38.73
• Approved Vendor 5/8"-11 HSS Plug Tap and 17/32" HSS 1/2" Shank Drill Bit SKU 25804 $37.34
• Milwaukee 5/8"-11 NC 1-7/16" Hex Threading Die SKU 495-49-57-5369 $16.91
• Approved Vendor 5/8"-11 STI Tap, High Speed Steel SKU 25812 $48.42
• Approved Vendor 5/8"-11 UNC Carbon Steel Hex Rethreading Die SKU 25815 $13.45

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