McMaster-Carr logo
    Filter by
    System of Measurement
    Chamfer Type
    Flute Type
    For Hole Type
    Number of Flutes
    Shank Type
    Pitch Diameter Limit
    Attribute Image
    Number of Tapping Ends
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    126 Products

    Chip-Clearing Taps for Aluminum, Brass, and Bronze

    Image of ProductInUse. Front orientation. Contains Annotated. Taps. Chip-Clearing Taps for Aluminum, Brass, and Bronze, Spiral Flute for Through Holes.

    Spiral Flute for Through Holes

    Image of ProductInUse. Front orientation. Taps. Chip-Clearing Taps for Aluminum, Brass, and Bronze, Spiral Flute for Blind Holes.

    Spiral Flute for Blind Holes

    Long, gummy strands from soft metals won’t get stuck on the tap or in the hole. With two layers of slippery coating over spiral flutes, these taps prevent chip buildup that can harm the threads and the tap.
    Cobalt Steel—Tough and wear resistant, cobalt taps last twice as long as high-speed steel. They also can run at higher temperatures without damage to their cutting edges.
    Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.
    Spiral Flute for Through Holes—Left-hand flutes push chips ahead of the tap and out of through holes.
    Spiral Flute for Blind Holes—Pull chips back toward the tap so they won't build up in blind holes.
    Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.
    Bottoming Chamfer—These taps have the shortest taper to thread close to the bottom of blind holes. They require the most force to turn, so they’re often used to finish holes started by plug-chamfer taps.
    Drill Bit
    Spiral Flute for
    Through Holes
    Spiral Flute for Blind Holes
    Thread Size
    Thread
    Lg.
    Overall
    Lg.
    Thread
    Type
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Chamfer
    Type
    No. of
    Flutes
    Each
    Chamfer
    Type
    No. of
    Flutes
    Each
    Cobalt Steel
     
    Titanium Nitride (TiN) Coated/Chromium Carbide (CrC) Coated
    2-56
    		5/16"1 49/64"UNC
    		51 Ga.
    		0.067"SquarePlug22687A41000000Bottoming32687A74000000
    4-40
    		5/16"2 13/64"UNC
    		43 Ga.
    		0.089"SquarePlug22687A4200000Bottoming32687A7500000
    5-40
    		5/16"2 13/64"UNC
    		38 Ga.
    		0.1015"SquarePlug22687A4300000Bottoming32687A7600000
    6-32
    		11/32"2 13/64"UNC
    		36 Ga.
    		0.1065"SquarePlug22687A4400000Bottoming32687A7700000
    8-32
    		7/16"2 31/64"UNC
    		29 Ga.
    		0.136"SquarePlug22687A4500000Bottoming32687A7800000
    10-24
    		15/32"2 49/64"UNC
    		25 Ga.
    		0.1495"SquarePlug22687A4600000Bottoming32687A7900000
    10-32
    		15/32"2 49/64"UNF
    		21 Ga.
    		0.159"SquarePlug22687A4700000Bottoming32687A8100000
    1/4"-20
    		19/32"3 5/32"UNC
    		7 Ga.
    		0.201"SquarePlug22687A4800000Bottoming32687A8200000
    1/4"-28
    		19/32"3 5/32"UNF
    		3 Ga.
    		0.213"SquarePlug22687A4900000Bottoming32687A8300000
    5/16"-18
    		19/32"3 35/64"UNC
    		F
    		0.257"SquarePlug22687A5100000Bottoming32687A8400000
    5/16"-24
    		19/32"3 35/64"UNF
    		I
    		0.272"SquarePlug22687A7100000—————0
    3/8"-16
    		3/4"3 15/16"UNC
    		5/16"
    		0.3125"SquarePlug22687A5300000Bottoming32687A8600000
    7/16"-14
    		23/32"3 15/16"UNC
    		U
    		0.368"SquarePlug32687A5500000—————0
    7/16"-20
    		23/32"3 15/16"UNF
    		25/64"
    		0.3906"SquarePlug32687A7300000—————0
    1/2"-13
    		29/32"4 21/64"UNC
    		27/64"
    		0.4219"SquarePlug32687A5700000Bottoming32687A9100000
    1/2"-20
    		29/32"4 21/64"UNF
    		29/64"
    		0.4531"SquarePlug32687A5800000—————0
    M3 × 0.5 mm5/16"2 13/64"Metric
    		2.5 mm
    		0.0984"SquarePlug22673A7100000Bottoming32673A2100000
    M3.5 × 0.6 mm11/32"2 13/64"Metric
    		2.9 mm
    		0.1142"SquarePlug22673A7200000—————0
    M4 × 0.7 mm7/16"2 31/64"Metric
    		3.3 mm
    		0.1299"SquarePlug22673A7300000Bottoming32673A2200000
    M5 × 0.8 mm15/32"2 49/64"Metric
    		4.2 mm
    		0.1654"SquarePlug22673A7400000Bottoming32673A2300000
    M6 × 1 mm15/32"3 5/32"Metric
    		5 mm
    		0.1968"SquarePlug22673A7500000Bottoming32673A2400000
    M7 × 1 mm19/32"3 35/64"Metric
    		6 mm
    		0.2362"SquarePlug22673A7600000—————0
    M8 × 1.25 mm19/32"3 35/64"Metric
    		6.7 mm
    		0.2638"SquarePlug22673A7800000—————0
    M10 × 1.25 mm23/32"3 15/16"Metric
    		8.7 mm
    		0.3425"SquarePlug22673A7900000—————0
    M10 × 1.5 mm23/32"3 15/16"Metric
    		8.5 mm
    		0.3346"SquarePlug22673A8100000Bottoming32673A2700000
    M12 × 1.25 mm27/32"4 21/64"Metric
    		10.8 mm
    		0.4251"SquarePlug32673A8200000—————0
    M12 × 1.5 mm27/32"4 21/64"Metric
    		10.5 mm
    		0.4133"SquarePlug32673A8300000Bottoming32673A2900000
    M12 × 1.75 mm27/32"4 21/64"Metric
    		10.2 mm
    		0.4016"SquarePlug32673A8400000Bottoming32673A2800000
     

    Taps

    Image of Product. Front orientation. Taps. Taps.
    Cut threads into holes so screws, bolts, and rods fit snugly. Our basic taps have straight flutes that are good for most jobs.
    Carbide—The hardest and most wear-resistant taps. They last 10 times longer than high-speed steel for the best performance on hard and abrasive materials like nickel and fiberglass. Carbide can be brittle, however, so these taps require a rigid machine tool holder to prevent breakage and should not be used for hand tapping.
    Titanium Aluminum Nitride (TiAlN) Coated—No taps last longer. These are the best for high-speed, high-temperature drilling of tough materials such as iron.
    Plug Chamfer—Our go-to chamfer type, these thread both through holes and blind holes. The tapered section is shorter than a taper chamfer and longer than bottoming chamfer. As a result, they're easier to turn than bottoming taps but require more force than taper taps.
    Bottoming Chamfer—Cut all the way to the bottom of blind holes with taps that have the shortest taper. Since these require the most force to turn, they’re often used to finish holes started by taper- or plug-chamfer taps.
    Number of Flutes—Taps with fewer flutes have more space to capture chips, so you won’t have to clear them as often. However, they can be more difficult to keep straight in the hole.
    Drill Bit
    Plug Chamfer
    Bottoming
    Chamfer
    Thread Size
    Thread
    Lg.
    Overall
    Lg.
    Thread
    Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    Each
    Carbide
     
    Titanium Aluminum Nitride (TiAlN) Coated
    0-80
    		9/32"1 5/8"UNF
    		23/64"
    		0.0469"Square7822N510000000———0
    2-56
    		7/16"1 3/4"UNC
    		251 Ga.
    		0.067"Square7822N520000007822N580000000
    4-40
    		5/16"1 7/8"UNC
    		243 Ga.
    		0.089"Square7822N240000007822N25000000
    6-32
    		3/8"2"UNC
    		336 Ga.
    		0.1065"Square7822N13000007822N1400000
    8-32
    		3/8"2 1/8"UNC
    		429 Ga.
    		0.136"Square7822N170000007822N18000000
    10-24
    		1/2"2 3/8"UNC
    		425 Ga.
    		0.1495"Square7822N280000007822N29000000
    10-32
    		1/2"2 3/8"UNF
    		421 Ga.
    		0.159"Square7822N150000007822N16000000
    1/4"-20
    		5/8"2 1/2"UNC
    		47 Ga.
    		0.201"Square7822N110000007822N12000000
    1/4"-28
    		5/8"2 1/2"UNF
    		43 Ga.
    		0.213"Square7822N530000007822N59000000
    5/16"-18
    		11/16"2 23/32"UNC
    		4F
    		0.257"Square7822N190000007822N21000000
    3/8"-16
    		3/4"2 15/16"UNC
    		45/16"
    		0.3125"Square7822N220000007822N23000000
    1/2"-13
    		15/16"3 3/8"UNC
    		427/64"
    		0.4219"Square7822N260000007822N27000000
    9/16"-12
    		1"3 19/32"UNC
    		431/64"
    		0.4844"Square7822N54000000———0
    5/8"-11
    		1 1/16"3 13/16"UNC
    		417/32"
    		0.5313"Square7822N550000007822N61000000
    3/4"-10
    		1 7/32"4 1/4"UNC
    		421/32"
    		0.6563"Square7822N560000007822N62000000
    3/4"-16
    		1 7/32"4 1/4"UNF
    		411/16"
    		0.6875"Square7822N57000000———0
    M3 × 0.5 mm5/16"1 15/16"Metric
    		32.5 mm
    		0.0984"Square7822N310000007822N32000000
    M4 × 0.7 mm3/8"2 1/8"Metric
    		43.3 mm
    		0.1299"Square7822N330000007822N34000000
    M5 × 0.8 mm1/2"2 3/8"Metric
    		44.2 mm
    		0.1654"Square7822N350000007822N36000000
    M6 × 1 mm5/8"2 1/2"Metric
    		45 mm
    		0.1969"Square7822N370000007822N38000000
    M8 × 1.25 mm11/16"2 23/32"Metric
    		46.7 mm
    		0.2638"Square7822N390000007822N41000000
    M10 × 1.5 mm1 1/4"2 31/32"Metric
    		48.5 mm
    		0.3346"Square7822N630000007822N64000000
     

    Thread Mills

    Cut a range of thread sizes with a single tool. These thread mills can also produce both right-hand and left-hand threads. All are made of solid carbide with an aluminum-titanium-nitride (AlTiN) coating, so they have high strength and excellent wear resistance, even when cutting hard and abrasive material. Use them in a CNC machine that allows helical interpolation.
    When used for internal threading, thread mills can create threads of any size equal to or greater than the minimum size listed. They leave space in the hole for chips to fall, and a broken thread mill can fall into the hole without damaging the workpiece.
    For Internal Threads (UNC, UNEF, UNF, UNJ, UNS)
    Image of ProductInUse. Front orientation. Thread Mills. For Internal Threads.
    Image of Product. Front orientation. Thread Mills. For Internal Threads.
    Thread mills cut internal UNC, UNEF, UNF, UNJ, or UNS threads, but the threads they create have a fixed pitch.
    For Min.
    Screw Size
    Threads
    per In.
    Thread
    Lg.
    Overall
    Lg.
    No. of
    Flutes
    Shank
    Size
    Each
    Aluminum Titanium Nitride (AlTiN)-Coated Carbide
    No. 4
    		403/16"2 1/2"21/4"5277N110000000
    No. 6
    		3217/64"2 1/2"31/4"5277N12000000
    No. 8
    		3217/64"2 1/2"31/4"5277N13000000
    No. 10
    		2411/32"2 1/2"31/4"5277N14000000
    No. 10
    		3221/64"2 1/2"31/4"5277N15000000
    1/4"
    		2033/64"2 1/2"31/4"5277N16000000
    5/16"
    		185/8"2 1/2"31/4"5277N17000000
    3/8"
    		1625/32"3"45/16"5277N18000000
    1/2"
    		137/8"3"43/8"5277N19000000
     
    For Internal Threads (Metric)
    Image of ProductInUse. Front orientation. Thread Mills. For Internal Threads.
    Image of Product. Front orientation. Thread Mills. For Internal Threads.
    Thread mills cut internal metric threads, but the threads they create have a fixed pitch.
    For Min.
    Screw Size
    Thread
    Pitch, mm
    Thread
    Lg.
    Overall
    Lg.
    No. of
    Flutes
    Shank
    Size
    Each
    Aluminum Titanium Nitride (AlTiN)-Coated Carbide
    M5
    		0.821/64"2 9/32"30.2362"5277N210000000
    M6
    		131/64"2 9/32"30.2362"5277N22000000
    M8
    		1.2521/32"2 9/32"30.2362"5277N23000000
     
    For Internal/External Threads (UNC, UNEF, UNF, UNS) and Internal Threads (UNJ)
    Image of ProductInUse. Front orientation. Thread Mills. For External Threads, For Internal Threads.
    Image of ProductInUse. Front orientation. Thread Mills. For External Threads, For Internal Threads.
    Image of Product. Front orientation. Thread Mills. For External Threads, For Internal Threads.
    Thread mills have a single cutting point that cuts internal/external UNC, UNEF, UNF, or UNS threads in a range of different pitches on both the inside and outside of the workpiece. They can also cut internal UNJ threads in a range of different pitches.
    For Min.
    Screw Size
    Threads
    per In.
    Overall
    Lg.
    Shank
    Size
    Neck
    Dia.
    Each
    Aluminum Titanium Nitride (AlTiN)-Coated Carbide
    No. 2
    		56 to 801 1/2"1/8"0.034"4425N11000000
    No. 4
    		48 to 802"3/16"0.045"4425N1200000
    No. 6
    		32 to 562"3/16"0.049"4425N1300000
    No. 8
    		32 to 562"3/16"0.07"4425N1400000
    No. 10
    		28 to 482"3/16"0.075"4425N1500000
    No. 12
    		24 to 482"3/16"0.08"4425N1600000
    1/4"
    		24 to 482 1/2"1/4"0.104"4425N1700000
    5/16"
    		16 to 482 1/2"1/4"0.153"4425N1800000
    3/8"
    		18 to 483"3/8"0.192"4425N1900000
    1/2"
    		12 to 483"3/8"0.24"4425N2100000
     

    Drill Out Tap Extractor Sets for Screw Thread Taps

    Image of Product. Front orientation. Tap Extractors. Drill Out Tap Extractor Sets for Screw Thread Taps.
    After using a large-diameter bit to drill a starter hole in a broken tap, drill out the tap with one of these tools. Sets include multiple extractors for use with different tap sizes and two picks for removing the remains.
    No. of
    Pieces
    Includes
    For Tap Size
    Overall Lg.
    OD
    Material
    Container
    Type
    Each
    7Four Tap Extractors, Pin Vise, Two PicksNo. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", M3, M3.5, M4, M5, M6, M7, M8, M10, M12
    		1 1/4"
    1 1/2"
    2"
    2 1/2"    		1/8"
    5/64"
    3/16"
    1/4"    		CarbidePlastic Case2624A250000000

    Drill Out Tap Extractors for Screw Thread Taps

    Image of Product. Front orientation. Tap Extractors. Drill Out Tap Extractors for Screw Thread Taps.
    After using a large-diameter bit to drill a starter hole in a broken tap, drill out the tap with one of these tools. Remove the remains with a scriber or pick.
    For Tap Size
    OD
    Overall
    Lg.
    Material
    Each
    No. 4, No. 5, No. 6, M3, M3.5
    		5/64"1 1/4"Carbide2624A11000000
    No. 8, No. 10, No. 12, M4, M5
    		1/8"1 1/2"Carbide2624A1200000
    1/4", 5/16", M6, M7
    		3/16"2"Carbide2624A1300000
    5/16", 3/8", 7/16", 1/2", M8, M10, M12
    		1/4"2 1/2"Carbide2624A1400000

    Friction Drill Bits for Tapping Sheet Metal

    Image of ProductInUse. Front orientation. ZoomedIn view. Contains Border. Friction Drill Bits.
    Image of Product. Front orientation. Friction Drill Bits.
    Pair these bits with a friction drill and a collet (sold separately) and mount on a drill press, milling machine, or CNC machine to use friction heat to melt through sheet metal and quickly produce a hole with a lip. The lip that is formed is approximately three times the material thickness.
    Friction Drill Bits
    Friction
    Drill Collets
    For Hole
    Thread Size
    Dia.
    Shank Dia.,
    mm
    For Material
    Thk. Range
    Min. Rotation
    Speed, rpm
    Material
    Each
    Each
    6-32
    		0.12"60.0394" to 0.0591"2,300Tungsten Carbide1643A210000001643A611000000
    8-32
    		0.15"60.0394" to 0.0591"2,200Tungsten Carbide1643A22000001643A61100000
    10-24
    		0.17"60.0394" to 0.0787"2,100Tungsten Carbide1643A23000001643A61100000
    1/4"-20
    		0.22"80.0394" to 0.0787"2,000Tungsten Carbide1643A24000001643A61200000
    5/16"-18
    		0.28"80.0394" to 0.0984"1,600Tungsten Carbide1643A250000001643A61200000
    3/8"-16
    		0.34"100.0394" to 0.0984"1,500Tungsten Carbide1643A260000001643A61300000
    1/2"-13
    		0.46"140.0339" to 0.1181"1,300Tungsten Carbide1643A270000001643A61400000
    back to top