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 23

• Approved Vendor 3/4"-24 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 21155 $51.96
• Approved Vendor 3/4"-28 UNS Carbon Steel Hex Die SKU 21157 $43.38
• Approved Vendor 3/4"-28 UNS HSS Plug Tap SKU 21158 $36.14
• Approved Vendor 3/4"-32 UNS HSS Plug Tap SKU 21160 $36.14
• Approved Vendor 3/4"-32 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 21161 $51.96
• Approved Vendor 3/4"-40 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 21162 $51.96
• Alfa Tool 3/4-10 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170946 $89.96
• Alfa Tool 3/4-10 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170946 $89.96
• Alfa Tool 3/4-10 HSS Eco Pro Hand Tap-Bottoming SKU HTB270046 $31.16
• Alfa Tool 3/4-10 HSS Eco Pro Hand Tap-Taper SKU HTT270046 $31.16
• Alfa Tool 3/4-10 HSS Eco Spiral Pointed Tap SKU SPT270142 $39.56
• Alfa Tool 3/4-10 HSS Hand Tap .005 Oversize SKU HTO71446 $37.90
• Alfa Tool 3/4-10 Multi Purpose Spiral Fluted Tap SKU HPMP70946 $114.82
• Alfa Tool 3/4-10 Multi Purpose Spiral Pointed Tap SKU HPMP90146 $94.02
• Alfa Tool 3/4-14 Bright Standard Straight Pipe Tap SKU BSPP70456 $78.34
• Alfa Tool 3/4-14 HSS Alfa Usa NPTF (Dry Seal) Pipe Tap SKU HSNPT180326 $82.70
• Alfa Tool 3/4-14 HSS NPT Screw Thread Insert Tap SKU STNPT66595 $230.48
• Alfa Tool 3/4-16 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170947 $89.96
• Alfa Tool 3/4-16 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170947 $89.96
• Alfa Tool 3/4-16 HSS Black Oxide Alfa Usa Hand Tap Set SKU HTS80047 $131.14
• Alfa Tool 3/4-16 HSS Eco Pro Hand Tap-Taper SKU HTT270047 $31.16
• Alfa Tool 3/4-16 HSS Eco Spiral Pointed Tap SKU SPT270143 $39.56
• Alfa Tool 3/4-16 HSS Hand Tap .005 Oversize SKU HTO71447 $37.90
• Alfa Tool 3/4-16 HSS Screw Thread Insert Taps SKU ST66547 $106.08
• Alfa Tool 3/4-16 HSS Spiral Pointed Tap Tin Coated SKU SPT170143TN $70.54
• Alfa Tool 3/4-16 HSS Usa Spiral Pointed Tap SKU SPT170143 $46.08
• Alfa Tool 3/4-16 Multi Purpose Spiral Fluted Tap SKU HPMP70947 $114.82
• Alfa Tool 3/4-16 Multi Purpose Spiral Pointed Tap SKU HPMP90147 $94.02
• Approved Vendor 3/8" 1MT Spiral Flute Car Reamer SKU 22099 $51.07
• Approved Vendor 3/8" HSS Spiral Flute Hand Expansion Reamer SKU 22185 $146.18
• Approved Vendor 3/8" HSS Spiral Flute Taper Pipe Reamer SKU 22187 $43.79
• Approved Vendor 3/8" Long Lag Shield Anchor Die Cast Zinc Alloy SKU 22204 $2.47
• Approved Vendor 3/8" NPS HSS Straight Pipe Tap SKU 22207 $29.94
• Approved Vendor 3/8" NPT 1-1/2" OD HSS Round Adjustable Pipe Die SKU 22208 $32.02
• Approved Vendor 3/8" NPT 2" OD HSS Round Adjustable Pipe Die SKU 22209 $58.37
• Approved Vendor 3/8" NPT Carbon Steel Pipe Tap SKU 22210 $7.19
• Approved Vendor 3/8" NPT HSS Pipe Tap, Qualtech SKU 22211 $23.76
• 3/8" NPT HSS Pipe Tap, Tap America SKU 22212 $39.66
• Approved Vendor 3/8" NPT Interrupted Thread HSS NPT Pipe Tap SKU 22213 $41.23
• Approved Vendor 3/8" Short Lag Shield Anchor Die Cast Zinc Alloy SKU 22221 $1.91
• Approved Vendor 3/8" X 2" Carbon Steel Square NPT Pipe Die SKU 22277 $64.57
• Approved Vendor 3/8" X 2-1/2" Carbon Steel Square NPT Pipe Die SKU 22281 $78.23
• Approved Vendor 3/8"-14 UNS X 1" OD HSS Round Adjustable Die SKU 22374 $33.01
• Approved Vendor 3/8"-16 Carbon Steel Hex Rethreading Die SKU 22390 $10.38
• Approved Vendor 3/8"-16 Carbon Steel Square Bolt Die SKU 22392 $64.33
• Approved Vendor 3/8"-16 HSS Machine and Fraction Hand Bottoming Tap SKU 22434 $10.39
• Approved Vendor 3/8"-16 HSS Machine and Fraction Hand Plug Tap SKU 22435 $10.39
• Approved Vendor 3/8"-16 HSS Machine and Fraction Hand Taper Tap SKU 22436 $10.39

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