McMaster-Carr logo
    Filter by
    System of Measurement
    Chamfer Type
    For Hole Type
    Number of Flutes
    Pitch Diameter Limit
    Attribute Image
    Shank Type
    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)
    254 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
     

    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 and titanium.
    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"Square0000000000000———0
    2-56
    		7/16"1 3/4"UNC
    		251
    		0.067"Square0000000000000000000000000
    4-40
    		5/16"1 7/8"UNC
    		243
    		0.089"Square000000000000000000000000
    6-32
    		3/8"2"UNC
    		336
    		0.1065"Square000000000000000000000000
    8-32
    		3/8"2 1/8"UNC
    		429
    		0.136"Square000000000000000000000000
    10-24
    		1/2"2 3/8"UNC
    		425
    		0.1495"Square000000000000000000000000
    10-32
    		1/2"2 3/8"UNF
    		421
    		0.159"Square000000000000000000000000
    1/4"-20
    		5/8"2 1/2"UNC
    		47
    		0.201"Square00000000000000000000000000
    1/4"-28
    		5/8"2 1/2"UNF
    		43
    		0.213"Square00000000000000000000000000
    5/16"-18
    		11/16"2 23/32"UNC
    		4F
    		0.257"Square00000000000000000000000000
    3/8"-16
    		3/4"2 15/16"UNC
    		45/16"
    		0.3125"Square00000000000000000000000000
    1/2"-13
    		15/16"3 3/8"UNC
    		427/64"
    		0.4219"Square00000000000000000000000000
    9/16"-12
    		1"3 19/32"UNC
    		431/64"
    		0.4844"Square0000000000000———0
    5/8"-11
    		1 1/16"3 13/16"UNC
    		417/32"
    		0.5313"Square00000000000000000000000000
    3/4"-10
    		1 7/32"4 1/4"UNC
    		421/32"
    		0.6563"Square00000000000000000000000000
    3/4"-16
    		1 7/32"4 1/4"UNF
    		411/16"
    		0.6875"Square0000000000000———0
    M3 × 0.5 mm5/16"1 15/16"Metric
    		32.5 mm
    		0.0984"Square000000000000000000000000
    M4 × 0.7 mm3/8"2 1/8"Metric
    		43.3 mm
    		0.1299"Square000000000000000000000000
    M5 × 0.8 mm1/2"2 3/8"Metric
    		44.2 mm
    		0.1654"Square000000000000000000000000
    M6 × 1 mm5/8"2 1/2"Metric
    		45 mm
    		0.1969"Square00000000000000000000000000
    M8 × 1.25 mm11/16"2 23/32"Metric
    		46.7 mm
    		0.2638"Square00000000000000000000000000
    M10 × 1.5 mm1 1/4"2 31/32"Metric
    		48.5 mm
    		0.3346"Square00000000000000000000000000
     

    Helical Insert Taps

    Image of Product. Front orientation. Taps. Helical Insert Taps.
    Match the size of helical inserts so they fit tightly when installed in the hole.
    High-Speed Steel—These taps resist heat and wear to stay sharp.
    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—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.
    Drill Bit
    Plug Chamfer
    Bottoming
    Chamfer
    For Insert
    Size
    Thread
    Lg.
    Overall
    Lg.
    For Insert
    Thread Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    Each
    High-Speed Steel
     
    Uncoated
    1/8
    		1 1/16"2 7/16"NPT
    		4W
    		0.386"Square000000000000000———0
    1/8
    		1 1/2"3 1/8"BSPP
    		425/64"
    		0.3906"Square00000000000000———0
    1/4
    		1 1/16"2 9/16"NPT
    		433/64"
    		0.5156"Square000000000000000———0
    1/4
    		1 5/8"3 1/2"BSPP
    		417/32"
    		0.5313"Square00000000000000———0
    3/8
    		1 3/8"3 1/8"NPT
    		421/32"
    		0.6563"Square000000000000000———0
    3/8
    		1 7/8"4"BSPP
    		443/64"
    		0.6719"Square000000000000000———0
    1/2
    		1 3/8"3 1/4"NPT
    		513/16"
    		0.8125"Square000000000000000———0
    1/2
    		2 1/4"4 7/8"BSPP
    		427/32"
    		0.8738"Square000000000000000———0
    0-80
    		3/8"1 11/16"UNF
    		252
    		0.0635"Square00000000000000000000000000000
    1-64
    		1/2"1 13/16"UNC
    		346
    		0.081"Square00000000000000———0
    1-64
    		9/16"1 7/8"UNC
    		346
    		0.0810"Square———000000000000000
    2-56
    		9/16"1 7/8"UNC
    		341
    		0.096"Square0000000000000000000000000000
    3-48
    		5/8"1 15/16"UNC
    		37/64"
    		0.1094"Square0000000000000000000000000000
    3-56
    		5/8"1 15/16"UNF
    		336
    		0.1065"Square0000000000000000000000000000
    4-40
    		11/16"2"UNC
    		331
    		0.12"Square0000000000000000000000000000
    4-48
    		11/16"2"UNF
    		331
    		0.12"Square0000000000000000000000000000
    5-40
    		3/4"2 1/8"UNC
    		329
    		0.136"Square0000000000000000000000000000
    6-32
    		7/8"2 3/8"UNC
    		325
    		0.1495"Square0000000000000000000000000000
    6-40
    		3/4"2 1/8"UNF
    		325
    		0.1495"Square0000000000000000000000000000
    8-32
    		15/16"2 3/8"UNC
    		316
    		0.177"Square0000000000000000000000000000
    8-36
    		15/16"2 3/8"UNF
    		316
    		0.177"Square0000000000000000000000000000
    10-24
    		1"2 1/2"UNC
    		35
    		0.2055"Square0000000000000000000000000000
    10-32
    		1"2 1/2"UNF
    		313/64"
    		0.2031"Square0000000000000000000000000000
    12-24
    		1 1/8"2 23/32"UNC
    		31
    		0.228"Square0000000000000000000000000000
    1/4"-20
    		1 1/8"2 23/32"UNC
    		3H
    		0.266"Square0000000000000000000000000000
    1/4"-28
    		1 1/8"2 23/32"UNF
    		36.7 mm
    		0.2637"Square0000000000000000000000000000
    5/16"-18
    		1 1/4"2 15/16"UNC
    		4Q
    		0.332"Square0000000000000000000000000000
    5/16"-24
    		1 1/4"2 15/16"UNF
    		421/64"
    		0.3281"Square0000000000000000000000000000
    3/8"-16
    		1 21/32"3 3/8"UNC
    		4X
    		0.397"Square0000000000000000000000000000
    3/8"-24
    		1 7/16"3 5/32"UNF
    		425/64"
    		0.3906"Square0000000000000000000000000000
    7/16"-14
    		1 21/32"3 19/32"UNC
    		429/64"
    		0.4531"Square0000000000000000000000000000
    7/16"-20
    		1 21/32"3 3/8"UNF
    		429/64"
    		0.4531"Square0000000000000000000000000000
    1/2"-13
    		1 13/16"3 13/16"UNC
    		417/32"
    		0.5313"Square0000000000000000000000000000
    1/2"-20
    		1 21/32"3 19/32"UNF
    		433/64"
    		0.5156"Square0000000000000000000000000000
    9/16"-12
    		1 13/16"4 1/32"UNC
    		419/32"
    		0.5938"Square00000000000000000000000000000
    9/16"-18
    		1 13/16"3 13/16"UNF
    		437/64"
    		0.5781"Square00000000000000000000000000000
    5/8"-11
    		2"4 1/4"UNC
    		421/32"
    		0.6563"Square00000000000000000000000000000
    5/8"-18
    		1 13/16"4 1/32"UNF
    		441/64"
    		0.6406"Square00000000000000000000000000000
    3/4"-10
    		2 7/32"4 11/16"UNC
    		425/32"
    		0.7813"Square000000000000000000000000000000
    3/4"-16
    		2"4 15/32"UNF
    		449/64"
    		0.7656"Square000000000000000000000000000000
    7/8"-9
    		2 1/2"5 1/16"UNC
    		429/32"
    		0.9063"Square000000000000000000000000000000
    7/8"-14
    		2 1/2"5 1/8"UNF
    		457/64"
    		0.8906"Square000000000000000000000000000000
    1"-8
    		2 9/16"5 3/4"UNC
    		41 1/32"
    		1.0313"Square000000000000000000000000000000
    1"-12
    		2 9/16"5 7/16"UNF
    		41 1/32"
    		1.0313"Square000000000000000000000000000000
    1"-14
    		2 9/16"5 7/16"UNF
    		41 1/32"
    		1.0313"Square000000000000000000000000000000
    1 1/8"-7
    		3"6 1/16"UNC
    		41 11/64"
    		1.1719"Square000000000000000000000000000000
    1 1/8"-12
    		2 9/16"5 3/4"UNF
    		41 5/32"
    		1.1563"Square———0000000000000000
    1 1/8"-12
    		2 9/16"5 3/4"UNF
    		61 5/32"
    		1.1563"Square000000000000000———0
    1 1/4"-7
    		3"6 3/8"UNC
    		41 19/64"
    		1.2969"Square000000000000000000000000000000
    1 1/4"-8
    		3"6"UN
    		41 1/4"
    		1.25"Square000000000000000000000000000000
    1 1/4"-12
    		3"6 1/16"UNF
    		41 9/32"
    		1.2813"Square———0000000000000000
    1 1/4"-12
    		3"6 1/16"UNF
    		61 9/32"
    		1.2813"Square000000000000000———0
    1 3/8"-6
    		3 3/16"6 11/16"UNC
    		61 27/64"
    		1.4219"Square———0000000000000000
    1 1/2"-6
    		3 3/16"7"UNC
    		61 35/64"
    		1.5469"Square000000000000000000000000000000
    1 1/2"-8
    		3"6 5/8"UN
    		61 1/2"
    		1.5"Square000000000000000000000000000000
    1 1/2"-12
    		3 3/16"6 11/16"UNF
    		61 17/32"
    		1.5313"Square000000000000000000000000000000
    1 3/4"-8
    		3 5/8"7 1/4"UN
    		61 3/4"
    		1.75"Square000000000000000———0
    1 3/4"-8
    		3 3/4"7 1/4"UN
    		61 3/4"
    		1.75"Square———0000000000000000
    M2
    		1/2"1 13/16"Metric
    		32.1 mm
    		0.0827"Square000000000000000000000000000000
    M2.2
    		9/16"1 7/8"Metric
    		32.3 mm
    		0.0906"Square———0000000000000000
    M2.2
    		9/16"1 7/8"Metric
    		32.35 mm
    		0.0925"Square00000000000000———0
    M2.5
    		5/8"1 15/16"Metric
    		337
    		0.104"Square0000000000000000000000000000
    M3
    		11/16"2"Metric
    		33.2 mm
    		0.1259"Square0000000000000000000000000000
    M3.5
    		3/4"2 1/8"Metric
    		33.7 mm
    		0.1456"Square00000000000000000000000000000
    M4
    		7/8"2 3/8"Metric
    		319
    		0.166"Square0000000000000000000000000000
    M5
    		1"2 1/2"Metric
    		35.3 mm
    		0.2086"Square0000000000000000000000000000
    M6
    		1 1/8"2 23/32"Metric
    		46.3 mm
    		0.248"Square0000000000000000000000000000
    M7
    		1 1/4"2 15/16"Metric
    		47.3 mm
    		0.2874"Square0000000000000000000000000000
    M8
    		1 1/4"2 15/16"Metric
    		48.3 mm
    		0.3267"Square0000000000000000000000000000
    M8
    		1 1/4"2 15/16"Metric
    		48.4 mm
    		0.3307"Square0000000000000000000000000000
    M10
    		1 7/16"3 3/16"Metric
    		413/32"
    		0.4063"Square0000000000000000000000000000
    M10
    		1 21/32"3 3/8"Metric
    		413/32"
    		0.4063"Square00000000000000000000000000000
    M10
    		1 21/32"3 3/8"Metric
    		410.5 mm
    		0.4134"Square0000000000000000000000000000
    M12
    		1 21/32"3 19/32"Metric
    		431/64"
    		0.4844"Square00000000000000000000000000000
    M12
    		1 21/32"3 19/32"Metric
    		412.5 mm
    		0.4921"Square0000000000000000000000000000
    M12
    		1 21/32"3 19/32"Metric
    		412.5 mm
    		0.4921"Square0000000000000000000000000000
    M14
    		1 13/16"3 13/16"Metric
    		437/64"
    		0.5781"Square00000000000000000000000000000
    M14
    		1 13/16"4 1/32"Metric
    		414.5 mm
    		0.5709"Square000000000000000000000000000000
    M16
    		2"4 1/4"Metric
    		421/32"
    		0.6563"Square000000000000000000000000000000
    M16
    		2"4 1/4"Metric
    		416.5 mm
    		0.6496"Square000000000000000000000000000000
    M18
    		2 7/32"4 11/16"Metric
    		447/64"
    		0.7344"Square000000000000000000000000000000
    M20
    		2 7/32"4 11/16"Metric
    		413/16"
    		0.8125"Square000000000000000000000000000000
    M20
    		2 7/32"4 29/32"Metric
    		413/16"
    		0.8125"Square000000000000000000000000000000
    M24
    		1 1/2"4"Metric
    		431/32"
    		0.9688"Square000000000000000000000000000000
    M30
    		1 1/2"4"Metric
    		41 7/32"
    		1.2188"Square000000000000000000000000000000
    M36
    		3 1/4"6 5/8"Metric
    		61 15/32"
    		1.4688"Square000000000000000000000000000000
     

    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
     

    Thread-Repairing File Sets

    Use these sets to repair fastener, pipe, and conduit threads.
    For Internal and External Threads
    Image of Product. Front orientation. Thread-Repairing Files. Thread-Repairing File Sets, For Internal and External Threads.
    No. of
    Pieces
    For Threads per In.
    For Thread Pitch, mm
    Overall
    Lg.
    Material
    Container
    Type
    Each
    48, 9, 10, 11, 11 1/2, 12, 13, 14, 16, 18, 20, 24, 27, 28, 320.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 39 1/4"SteelPlastic Pouch00000000000000

    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
     

    Left-Hand Thread Helical Insert Taps

    Image of Product. Front orientation. Taps. Left-Hand Thread Helical Insert Taps.
    Size holes for installing helical inserts that anchor left-hand bolts and rods. Helical inserts reinforce the connection between holes and fasteners that secure counter-clockwise rotating parts. Left-hand threads keep components such as flywheels and propellers from loosening and spinning off.
    High-Speed Steel—These taps resist heat and wear to stay sharp.
    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
    Plug Chamfer
    For Insert
    Size
    Thread
    Lg.
    Overall
    Lg.
    For Insert
    Thread Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    High-Speed Steel
     
    Uncoated
    1/4"-20
    		1 1/8"2 23/32"UNC
    		4H
    		0.266"Square000000000000000
    1/4"-28
    		1 1/8"2 23/32"UNF
    		46.7 mm
    		0.2637"Square00000000000000
    5/16"-18
    		1 1/4"2 15/16"UNC
    		4Q
    		0.332"Square00000000000000
    5/16"-24
    		1 1/4"2 15/16"UNF
    		421/64"
    		0.3281"Square00000000000000
    3/8"-16
    		1 21/32"3 3/8"UNC
    		4X
    		0.397"Square00000000000000
    3/8"-24
    		1 7/16"3 5/32"UNF
    		425/64"
    		0.3906"Square00000000000000
    1/2"-13
    		1 13/16"3 13/16"UNC
    		417/32"
    		0.5313"Square00000000000000
    1/2"-20
    		1 21/32"3 19/32"UNF
    		433/64"
    		0.5156"Square00000000000000
    5/8"-11
    		1 13/16"4 1/4"UNC
    		421/32"
    		0.6563"Square00000000000000
    5/8"-18
    		1 13/16"4 1/32"UNF
    		441/64"
    		0.6406"Square00000000000000
    3/4"-10
    		2 7/32"4.667"UNC
    		425/32"
    		0.7813"Square000000000000000
     

    Fastener Thread-Repairing Files

    Repair rusted and damaged fastener threads. One file restores a range of thread sizes.
    For Internal and External Threads
    Image of Product. Front orientation. Thread-Repairing Files. Fastener Thread-Repairing Files, For Internal and External Threads.
    For Threads per In.
    For Thread Pitch, mm
    Wd.
    Thk.
    Overall
    Lg.
    Material
    Each
    —0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 33/8"3/8"9 1/4"Steel0000000000000
    9, 10, 12, 16, 20, 27, 28, 32—3/8"3/8"9 1/4"Steel000000000000
    11, 12, 13, 14, 16, 18, 20, 24—3/8"3/8"9 1/4"Steel000000000000

    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"Steel00000000000006000000000000
    8, 11 1/27/16"7/16"10"Steel000000000000600000000000
    10, 147/16"7/16"10"Steel000000000000600000000000
    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