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 14

• Approved Vendor 1/4"-80 UNS X 1" OD HSS Round Adjustable Die SKU 16715 $33.01
• Alfa Tool 1/4-18 HSS NPT Screw Thread Insert Tap SKU STNPT66592 $78.34
• Alfa Tool 1/4-20 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170930 $15.20
• Alfa Tool 1/4-20 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170930 $15.20
• Alfa Tool 1/4-20 HSS Combination Drill Tap 1/4 Shank SKU DTML66107 $24.46
• Alfa Tool 1/4-20 HSS Eco Spiral Pointed Tap SKU SPT270128 $5.30
• Alfa Tool 1/4-20 HSS Hand Tap .005 Oversize SKU HTO71430 $6.62
• Alfa Tool 1/4-28 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170931 $15.20
• Alfa Tool 1/4-28 HSS Combination Drill Tap 1/4 Shank SKU DTML66108 $24.46
• Alfa Tool 1/4-28 HSS Eco Spiral Pointed Tap SKU SPT270129 $5.30
• Alfa Tool 1/4-28 HSS Hand Tap .005 Oversize SKU HTO71431 $6.62
• Alfa Tool 1/4-28 HSS Usa Spiral Pointed Tap SKU SPT170129 $7.58
• Approved Vendor 1/8" HSS Spiral Flute Taper Pipe Reamer SKU 17557 $30.80
• Approved Vendor 1/8" NPS HSS Straight Pipe Tap SKU 17569 $17.96
• Approved Vendor 1/8" NPT 1" OD HSS Round Adjustable Pipe Die SKU 17570 $19.91
• Approved Vendor 1/8" NPT 1-1/2" OD HSS Round Adjustable Pipe Die SKU 17571 $32.02
• Approved Vendor 1/8" NPT Carbon Steel Pipe Tap SKU 17572 $4.71
• Approved Vendor 1/8" NPT HSS Pipe Tap, Qualtech SKU 17573 $16.35
• 1/8" NPT HSS Pipe Tap, Tap America SKU 17574 $27.38
• Approved Vendor 1/8" NPT Interrupted Thread HSS NPT Pipe Tap SKU 17575 $27.04
• Approved Vendor 1/8" X 2" Carbon Steel Square NPT Pipe Die SKU 17605 $64.57
• Approved Vendor 1/8" X 2-1/2" Carbon Steel Square NPT Pipe Die SKU 17607 $78.23
• Approved Vendor 1/8"-27 NPS 1" OD HSS Round Adjustable Pipe Die SKU 17652 $22.90
• Approved Vendor 1/8"-27 NPS 1-1/2" OD HSS Round Adjustable Pipe Die SKU 17653 $34.72
• Milwaukee 1/8"-27 NPT 1-Inch Hex Threading Die SKU 495-49-57-5389 $7.90
• Approved Vendor 1/8"-27 NPT Carbon Steel Hex Pipe Die SKU 17654 $10.37
• Milwaukee 1/8"-28 BSP Straight Flute Taper Tap SKU 495-49-57-5190 $9.40
• Alfa Tool 1/8-27 HSS NPT Screw Thread Insert Tap SKU STNPT66591 $68.50
• Alfa Tool 10 X 1.25mm HS Usa Spiral Pointed Tap SKU SPTM170167 $16.06
• Alfa Tool 10 X 1.5mm HS Usa Spiral Pointed Tap SKU SPTM170166 $16.06
• Approved Vendor 10-24 Carbon Steel Hex Rethreading Die SKU 17738 $9.99
• Alfa Tool 10-24 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170915 $14.08
• Alfa Tool 10-24 HSS Combination Drill Tap 1/4 Hex Shank SKU DTML66105 $23.04
• Alfa Tool 10-24 HSS Hand Tap .005 Oversize SKU HTO71415 $6.52
• Approved Vendor 10-24 HSS Machine and Fraction Hand Bottoming Tap SKU 17741 $8.48
• Approved Vendor 10-24 HSS Machine and Fraction Hand Plug Tap SKU 17742 $8.48
• Alfa Tool 10-24 HSS Usa Spiral Pointed Tap SKU SPT170115 $7.58
• Milwaukee 10-24 NC 1-Inch Hex Threading Die SKU 495-49-57-5325 $9.25
• Approved Vendor 10-32 Carbon Steel Hex Rethreading Die SKU 17745 $9.99
• Alfa Tool 10-32 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170916 $15.20
• Alfa Tool 10-32 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170916 $15.20
• Alfa Tool 10-32 HSS Combination Drill Tap 1/4 Hex Shank SKU DTML66106 $23.04
• Alfa Tool 10-32 HSS Hand Tap .005 Oversize SKU HTO71416 $7.20
• Approved Vendor 10-32 HSS Machine and Fraction Hand Bottoming Tap SKU 17748 $8.48
• Approved Vendor 10-32 HSS Nut Tap SKU 17751 $53.74
• Milwaukee 10-32 NF 1-Inch Hex Threading Die SKU 495-49-57-5327 $9.25
• Alfa Tool 11 X 1.5mm HSS Metric Tap Bottoming Eco Pro SKU HSMTB271030 $12.78
• Approved Vendor 11/16" 3MT Spiral Flute Car Reamer SKU 17848 $63.20

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