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 11
- Approved Vendor 1/2"-20 UNF X 2" OD HSS Round Adjustable Die SKU 15029 $37.08
- Approved Vendor 1/2"-20 x 6" HSS Pulley Tap SKU 15033 $37.19
- Approved Vendor 1/2"-20 x 6" HSS Spiral Point Tap SKU 15034 $41.72
- Approved Vendor 1/2"-24 UNS Carbon Steel Hex Die SKU 15067 $38.20
- Approved Vendor 1/2"-24 UNS HSS Plug Tap SKU 15068 $23.50
- Approved Vendor 1/2"-24 UNS X 1" OD HSS Round Adjustable Die SKU 15069 $33.01
- Approved Vendor 1/2"-24 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 15070 $51.96
- Approved Vendor 1/2"-27 UNS Carbon Steel Hex Die SKU 15071 $38.20
- Approved Vendor 1/2"-27 UNS HSS Plug Tap SKU 15072 $23.50
- Approved Vendor 1/2"-27 UNS X 1" OD HSS Round Adjustable Die SKU 15073 $33.01
- Approved Vendor 1/2"-28 UNS Carbon Steel Hex Die SKU 15074 $38.20
- Approved Vendor 1/2"-28 UNS HSS Plug Tap SKU 15075 $23.50
- Approved Vendor 1/2"-28 UNS X 1" OD HSS Round Adjustable Die SKU 15076 $33.01
- Approved Vendor 1/2"-32 UNS Carbon Steel Hex Die SKU 15080 $38.20
- Approved Vendor 1/2"-32 UNS HSS Plug Tap SKU 15081 $23.50
- Approved Vendor 1/2"-32 UNS X 1" OD HSS Round Adjustable Die SKU 15082 $33.01
- Approved Vendor 1/2"-36 UNS Carbon Steel Hex Die SKU 15083 $38.20
- Approved Vendor 1/2"-36 UNS HSS Plug Tap SKU 15084 $23.50
- Approved Vendor 1/2"-36 UNS X 1" OD HSS Round Adjustable Die SKU 15085 $33.01
- Approved Vendor 1/2"-40 UNS X 1" OD HSS Round Adjustable Die SKU 15086 $33.01
- Approved Vendor 1/2"-40 UNS X 1-1/2" OD HSS Round Adjustable Die SKU 15087 $51.96
- Approved Vendor 1/2"-48 UNS X 1" OD HSS Round Adjustable Die SKU 15088 $33.01
- Alfa Tool 1/2-13 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170938 $39.94
- Alfa Tool 1/2-13 HSS Combination Drill Tap 1/4 Shank SKU DTML66115 $42.74
- Alfa Tool 1/2-13 HSS Eco Pro Hand Tap-Taper SKU HTT270038 $13.44
- Alfa Tool 1/2-13 HSS Eco Spiral Pointed Tap SKU SPT270136 $14.30
- Alfa Tool 1/2-13 HSS Hand Tap .005 Oversize SKU HTO71438 $15.26
- Alfa Tool 1/2-13 HSS Spiral Pointed Tap .005 Oversized SKU SPTO71536 $17.28
- Alfa Tool 1/2-13 Multi Purpose Spiral Fluted Tap SKU HPMP70938 $78.94
- Alfa Tool 1/2-14 Bright Standard Straight Pipe Tap SKU BSPP70455 $52.84
- Alfa Tool 1/2-14 HSS Alfa Usa NPS Pipe Tap SKU HSNPS172326 $67.72
- Alfa Tool 1/2-14 HSS Alfa Usa NPTF (Dry Seal) Pipe Tap SKU HSNPT180325 $58.46
- Alfa Tool 1/2-14 HSS NPT Screw Thread Insert Tap SKU STNPT66594 $163.64
- Alfa Tool 1/2-20 HSS Alfa Usa Spiral Fluted Tap SKU SFTP170939 $39.94
- Alfa Tool 1/2-20 HSS Alfa Usa Spiral Fluted Tap Bottoming SKU SFTB170939 $39.94
- Alfa Tool 1/2-20 HSS Combination Drill Tap 1/4 Shank SKU DTML66116 $42.74
- Alfa Tool 1/2-20 HSS Eco Pro Hand Tap-Bottoming SKU HTB270039 $13.44
- Alfa Tool 1/2-20 HSS Eco Spiral Pointed Tap SKU SPT270137 $14.30
- Alfa Tool 1/2-20 HSS Hand Tap .005 Oversize SKU HTO71439 $15.26
- Alfa Tool 1/2-20 HSS Spiral Pointed Tap .005 Oversized SKU SPTO71537 $17.28
- Alfa Tool 1/2-20 HSS Usa Spiral Pointed Tap SKU SPT170137 $17.32
- Alfa Tool 1/2-20 Multi Purpose Spiral Fluted Tap SKU HPMP70939 $78.94
- Alfa Tool 1/2-20 Multi Purpose Spiral Pointed Tap SKU HPMP90139 $59.40
- Alfa Tool 1/2X28 HS Round Adjustable Die 1"O.D. SKU RDSP74798 $16.54
- Milwaukee 1/4" 3/8" 1/2" Replacement Cutting Die Set SKU 495-48-44-2872 $95.66
- Approved Vendor 1/4" HSS Spiral Flute Hand Expansion Reamer SKU 16073 $138.07
- Approved Vendor 1/4" HSS Spiral Flute Hand Reamer SKU 16074 $32.80
- Approved Vendor 1/4" HSS Spiral Flute Taper Pipe Reamer SKU 16075 $40.55