McMaster-Carr logo
    Filter by
    System of Measurement
    For Hole Type
    Number of Flutes
    Pitch Diameter Limit
    Attribute Image
    Chamfer Type
    Shank Type
    Number of Pieces
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    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)
    85 Products

    Chip-Clearing Tap Sets

    A range of sizes that remove chips so they don’t ruin the threads or jam the tap. The spiral-point flutes force chips through the hole to prevent buildup and create threads faster than standard taps. Also known as gun taps.
    High-Speed Steel
    Image of Product. Front orientation. Taps. Chip-Clearing Tap Sets.
    The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.
    Uncoated—The economical choice, these won't last as long as coated taps.
    Gold Oxide—The finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than uncoated taps.
    Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.
    Plug Chamfer
    No. of
    Pieces
    Thread Size
    Thread
    Type
    Flute Type
    Container
    Type
    Shank
    Type
    Specs.
    Met
    Each
    Uncoated
    7M3, M4, M5, M6, M8, M10, M12
    		Metric
    		Spiral PointPlastic CaseSquareISO 52900000000000000
     
    Gold Oxide
    101/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20
    		UNF, UNC
    		Spiral PointMetal CaseSquare—00000000000000
    190-80, 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-40, 4-48, 5-40, 5-44, 6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, 12-28
    		UNF, UNC
    		Spiral PointMetal CaseSquare—00000000000000
     
    Titanium Nitride (TiN) Coated
    7M3, M4, M5, M6, M8, M10, M12
    		Metric
    		Spiral PointPlastic CaseSquareISO 5290000000000000
     

    Chip-Clearing Taps for Titanium

    Image of ProductInUse. Front orientation. Contains Annotated. Taps. Chip-Clearing Taps for Titanium, Spiral Flute for Through Holes.

    Spiral Flute for Through Holes

    Image of ProductInUse. Front orientation. Contains Annotated. Taps. Chip-Clearing Taps for Titanium, Spiral Flute for Blind Holes.

    Spiral Flute for Blind Holes

    Sharp, angled flutes cut through tough titanium alloys while reducing heat and preventing clogs. These taps draw out chips gradually to create clean threads and protect the tap from jamming or breaking.
    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.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than 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.
    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
     
    Black Oxide
    2-56
    		1/4"1 3/4"UNC
    		51 Ga.
    		0.067"Square—————0Plug20000000000000
    4-40
    		13/32"2 3/16"UNC
    		43 Ga.
    		0.089"SquarePlug20000000000000Plug2000000000000
    5-40
    		13/32"2 3/16"UNC
    		38 Ga.
    		0.1015"SquarePlug2000000000000Plug2000000000000
    6-32
    		15/32"2 3/16"UNC
    		36 Ga.
    		0.1065"SquarePlug3000000000000Plug3000000000000
    6-40
    		15/32"2 3/16"UNF
    		33 Ga.
    		0.113"Square—————0Plug3000000000000
    8-32
    		1/2"2 15/32"UNC
    		29 Ga.
    		0.136"SquarePlug3000000000000Plug3000000000000
    8-36
    		1/2"2 15/32"UNF
    		29 Ga.
    		0.136"Square—————0Plug3000000000000
    10-24
    		19/32"2 3/4"UNC
    		25 Ga.
    		0.1495"SquarePlug3000000000000Plug3000000000000
    10-32
    		19/32"2 3/4"UNF
    		21 Ga.
    		0.159"SquarePlug3000000000000Plug3000000000000
    12-28
    		5/8"3 5/32"UNF
    		15 Ga.
    		0.18"Square—————0Plug3000000000000
    1/4"-20
    		21/32"3 5/32"UNC
    		7 Ga.
    		0.201"SquarePlug3000000000000Plug3000000000000
    1/4"-28
    		21/32"3 5/32"UNF
    		3 Ga.
    		0.213"SquarePlug3000000000000Plug3000000000000
    5/16"-18
    		25/32"3 17/32"UNC
    		F
    		0.257"SquarePlug3000000000000Plug3000000000000
    5/16"-24
    		25/32"3 17/32"UNF
    		I
    		0.272"SquarePlug3000000000000Plug3000000000000
    3/8"-16
    		27/32"3 15/16"UNC
    		5/16"
    		0.3125"SquarePlug3000000000000Plug3000000000000
    3/8"-24
    		27/32"3 15/16"UNF
    		Q
    		0.332"SquarePlug3000000000000Plug3000000000000
    7/16"-14
    		27/32"3 15/16"UNC
    		U
    		0.368"SquarePlug30000000000000Plug30000000000000
    7/16"-20
    		27/32"3 15/16"UNF
    		25/64"
    		0.3906"SquarePlug30000000000000Plug30000000000000
    1/2"-13
    		31/32"4 5/16"UNC
    		27/64"
    		0.4219"SquarePlug30000000000000Plug30000000000000
    1/2"-20
    		27/32"3 15/16"UNF
    		29/64"
    		0.4531"SquarePlug30000000000000Plug30000000000000
    5/8"-11
    		11/16"4 5/16"UNC
    		17/32"
    		0.5313"SquarePlug30000000000000—————0
    5/8"-18
    		27/32"3 15/16"UNF
    		37/64"
    		0.5781"SquarePlug30000000000000—————0
    3/4"-10
    		13/16"4 29/32"UNC
    		21/32"
    		0.6563"SquarePlug30000000000000—————0
    3/4"-16
    		31/32"4 5/16"UNF
    		11/16"
    		0.6875"SquarePlug40000000000000—————0
     

    Chip-Clearing Tap and Drill Bit Sets for Through Holes

    Image of Product. Front orientation. Tap and Drill Bit Sets. Chip-Clearing Tap and Drill Bit Sets for Through Holes.
    Also known as gun taps, the taps in these sets have spiral-point flutes that push chips ahead of the tap and out of through holes. Because they don't need to be reversed to prevent buildup, they produce threads more efficiently than standard taps and are suitable for production work. Taps have a square shank for compatibility with tap wrenches and tap holders for drill presses and milling machines. With a plug chamfer, they have 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. All taps and drill bits are made of high-speed steel for use on most metal and plastic.
    No. of
    Pieces
    Chamfer
    Type
    Tap Sizes
    Included
    Overall Lg.
    Thread
    Type
    No. of
    Flutes
    Pitch Dia.
    Limit
    Drill Bit Sizes
    Included
    Drill Bit Material
    Container
    Type
    Each
    Gold-Oxide High-Speed Steel Tap
    18Plug6-40
    8-36
    10-24
    10-32
    1/4"-28
    5/16"-24
    3/8"-24
    7/16"-20
    1/2"-20    		2 1/16"
    2 7/32"
    2 15/32"
    2 5/8"
    2 7/8"
    3 1/8"
    3 5/32"
    3 3/8"    		UNF
    		2, 3H2, H329/64"
    25/64"
    33 ga.
    29 ga.
    25 ga.
    21 ga.
    3 ga.
    I
    Q    		Gold-Oxide High-Speed SteelMetal Case000000000000000
    18PlugM2.5 × 0.45 mm
    M3 × 0.5 mm
    M3.5 × 0.6 mm
    M4 × 0.7 mm
    M5 × 0.8 mm
    M6 × 1.00 mm
    M8 × 1.25 mm
    M10 × 1.5 mm
    M12 × 1.75 mm    		1 13/16"
    1 15/16"
    2"
    2 1/8"
    2 3/8"
    2 1/2"
    2 23/32"
    2 15/16"
    3 3/8"    		Metric
    		2, 3D3, D4, D5, D62.05 mm
    2.5 mm
    2.9 mm
    3.3 mm
    4.2 mm
    5 mm
    6.7 mm
    8.5 mm
    10.2 mm    		Gold-Oxide High-Speed SteelMetal Case00000000000000
     

    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"00000000000000
    No. 6
    		3217/64"2 1/2"31/4"0000000000000
    No. 8
    		3217/64"2 1/2"31/4"0000000000000
    No. 10
    		2411/32"2 1/2"31/4"0000000000000
    No. 10
    		3221/64"2 1/2"31/4"0000000000000
    1/4"
    		2033/64"2 1/2"31/4"0000000000000
    5/16"
    		185/8"2 1/2"31/4"0000000000000
    3/8"
    		1625/32"3"45/16"0000000000000
    1/2"
    		137/8"3"43/8"0000000000000
     
    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"00000000000000
    M6
    		131/64"2 9/32"30.2362"0000000000000
    M8
    		1.2521/32"2 9/32"30.2362"0000000000000
     
    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"0000000000000
    No. 4
    		48 to 802"3/16"0.045"000000000000
    No. 6
    		32 to 562"3/16"0.049"000000000000
    No. 8
    		32 to 562"3/16"0.07"000000000000
    No. 10
    		28 to 482"3/16"0.075"000000000000
    No. 12
    		24 to 482"3/16"0.08"000000000000
    1/4"
    		24 to 482 1/2"1/4"0.104"000000000000
    5/16"
    		16 to 482 1/2"1/4"0.153"000000000000
    3/8"
    		18 to 483"3/8"0.192"000000000000
    1/2"
    		12 to 483"3/8"0.24"000000000000
     

    Internal Thread Repair Tools for Any Thread Pitch

    Image of ProductInUse. Front orientation. Thread Repair Tools. Internal Thread Repair Tools for Any Thread Pitch.
    These tools have adjustable blades to repair any inch or metric thread size. Use them on threaded holes with an ID from 5/16" to 1 1/4" or 8 mm to 32 mm.
    Thread Repair Tools
    Replacement Thread
    Repair Tool Pads
    Replacement Thread
    Repair Tool Blades
    For ID
    For Threads
    per Inch
    For Thread
    Pitch
    Overall
    Lg.
    Blade
    Material
    Handle
    Material
    Each
    Each
    Each
    5/16" to 7/16", 8 mm to 11 mmAnyAny4 5/16"SteelPlastic000000000000000000000000000000000000000
    1/2" to 5/8", 12 mm to 16 mmAnyAny4 5/16"SteelPlastic000000000000000000000000000000000000
    11/16" to 13/16", 16 mm to 20 mmAnyAny4 3/8"SteelPlastic000000000000000000000000000000000000
    7/8" to 1 1/4", 22 mm to 32 mmAnyAny5 3/8"SteelPlastic000000000000000000000000000000000000
     

    Pipe and Conduit Thread-Repairing Files

    Repair rusted and damaged threads in pipe and conduit. One file restores a range of thread sizes.
    For Internal Threads
    Image of Product. Front orientation. Thread-Repairing Files. Pipe and Conduit Thread-Repairing Files, For Internal Threads.
    Thread File Handles—Thread file handles slip over the file to provide a comfortable grip.
    Thread-Repairing Files
    Thread File Handles
    For Threads
    per In.
    Wd.
    Thk.
    Overall
    Lg.
    Material
    Each
    Pkg.
    Qty.
    Pkg.
    8, 107/16"7/16"10"Steel000000000000010000000000000
    8, 11 1/27/16"7/16"10"Steel0000000000001000000000000
    10, 147/16"7/16"10"Steel0000000000001000000000000
    For Internal and External Threads
    Image of Product. Front orientation. Thread-Repairing Files. Pipe and Conduit Thread-Repairing Files, For Internal and External Threads.
    For Threads per In.
    Wd.
    Thk.
    Overall
    Lg.
    Material
    Each
    8, 10, 11 1/2, 14, 16, 18, 24, 273/8"3/8"9 1/4"Steel0000000000000
    back to top