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    276 Products

    Left-Hand Thread Taps

    Image of Product. Front orientation. Taps. Left-Hand Thread Taps.
    Create left-hand threads that prevent counter-clockwise rotating parts, such as flywheels and propellers, from loosening and spinning off. These taps have straight flutes that are good for most jobs.
    High-Speed Steel—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.
    Taper Chamfer—Good for both starting holes and threading through holes. These taps have the longest taper to gradually engage with the material, reducing the force needed to turn them. They can't reach the bottom of blind holes, however, so you will likely need to finish with a bottoming-chamfer tap.
    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.
    Taps Sold as Sets—Include one tap of each chamfer type.
    Taps
    Taps Sold as Sets
    Drill Bit
    Taper Chamfer
    Plug Chamfer
    Bottoming
    Chamfer
    Thread Size
    Thread
    Lg.
    Overall
    Lg.
    Thread
    Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    Each
    Each
    No. of
    Taps
    Each
    High-Speed Steel
     
    Uncoated
    6-32
    11/16"2"UNC
    336 Ga.
    0.1065"Square———000000000000000000000000000———0
    8-32
    3/4"2 1/8"UNC
    429 Ga.
    0.136"Square0000000000000000000000000000000000000300000000000000
    10-24
    7/8"2 3/8"UNC
    425 Ga.
    0.1495"Square000000000000000000000000000000000000———0
    10-32
    7/8"2 3/8"UNF
    421 Ga.
    0.159"Square00000000000000000000000000000000000030000000000000
    1/4"-20
    1"2 1/2"UNC
    47 Ga.
    0.201"Square00000000000000000000000000000000030000000000000
    1/4"-28
    1"2 1/2"UNF
    43 Ga.
    0.213"Square00000000000000000000000000000000000030000000000000
    1/4"-40
    1"2 1/2"UNS
    42 Ga.
    0.221"Square000000000000000000000000000000000000000300000000000000
    5/16"-18
    1 1/8"2 23/32"UNC
    4F
    0.257"Square00000000000000000000000000000000000030000000000000
    5/16"-20
    1 1/8"2 23/32"UNS
    4G
    0.261"Square00000000000000000000000000———0300000000000000
    5/16"-24
    1 1/8"2 23/32"UNF
    4I
    0.272"Square00000000000000000000000000000000000030000000000000
    3/8"-16
    1 1/4"2 15/16"UNC
    45/16"
    0.3125"Square00000000000000000000000000000000000030000000000000
    3/8"-24
    1 1/4"2 15/16"UNF
    4Q
    0.332"Square00000000000000000000000000000000000030000000000000
    7/16"-14
    1 7/16"3 5/32"UNC
    4U
    0.368"Square000000000000000000000000000000000000———0
    7/16"-20
    1 7/16"3 5/32"UNF
    425/64"
    0.3906"Square000000000000000000000000000000000000———0
    1/2"-13
    1 21/32"3 3/8"UNC
    427/64"
    0.4219"Square00000000000000000000000000000000000030000000000000
    1/2"-20
    1 21/32"3 3/8"UNF
    429/64"
    0.4531"Square00000000000000000000000000000000000030000000000000
    9/16"-18
    1 21/32"3 19/32"UNF
    433/64"
    0.5156"Square00000000000000000000000000———0———0
    9/16"-20
    1 21/32"3 19/32"UNS
    433/64"
    0.5156"Square000000000000000000000000000000000000000300000000000000
    5/8"-11
    1 13/16"3 13/16"UNC
    417/32"
    0.5313"Square000000000000000000000000000000000000———0
    5/8"-18
    1 13/16"3 13/16"UNF
    437/64"
    0.5781"Square000000000000000000000000000000000000———0
    11/16"-16
    1 13/16"4 1/32"UNF
    45/8"
    0.625"Square00000000000000000000000000———0300000000000000
    11/16"-18
    1 13/16"4 1/32"UNS
    616 mm
    0.6299"Square000000000000000000000000000000000000000000300000000000000
    3/4"-10
    2"4 1/4"UNC
    421/32"
    0.6563"Square000000000000000000000000000000000000———0
    3/4"-16
    2"4 1/4"UNF
    411/16"
    0.6875"Square000000000000000000000000000000000000———0
    7/8"-18
    2 7/32"4 11/16"UNS
    653/64"
    0.8281"Square000000000000000000000000000000000000000000300000000000000
    1"-8
    2 1/2"5 1/8"UNC
    47/8"
    0.875"Square000000000000000000000000000000000000300000000000000
    1"-12
    2 1/2"5 1/8"UNF
    459/64"
    0.9219"Square000000000000000000000000000000000000300000000000000
    1"-14
    2 1/2"5 1/8"UNS
    423.6 mm
    0.9291"Square000000000000000000000000000000000000300000000000000
    1"-16
    2 1/2"5 1/8"UNS
    615/16"
    0.9375"Square000000000000000000000000000000000000000000300000000000000
    1"-20
    2 1/2"5 1/8"UNEF
    661/64"
    0.9531"Square———000000000000000———0300000000000000
    1 1/8"-7
    2 9/16"5 7/16"UNC
    463/64"
    0.9844"Square000000000000000000000000000000000000000300000000000000
    1 1/8"-12
    2 9/16"5 7/16"UNF
    41 1/32"
    1.0313"Square000000000000000000000000000000000000000300000000000000
    1 1/4"-7
    2 9/16"5 3/4"UNC
    41 3/32"
    1.0938"Square000000000000000000000000000000000000000300000000000000
    1 1/4"-12
    2 9/16"5 3/4"UNF
    41 11/64"
    1.1719"Square000000000000000000000000000000000000000300000000000000
    1 1/2"-6
    3"6 3/8"UNC
    41 11/32"
    1.3438"Square00000000000000000000000000———0300000000000000
    1 1/2"-12
    3"6 3/8"UNF
    61 27/64"
    1.4219"Square000000000000000000000000000000000000000300000000000000
    M4 × 0.7 mm3/4"2 1/8"Metric
    43.3 mm
    0.1299"Square00000000000000000000000000000000000030000000000000
    M4.5 × 0.75 mm7/8"2 3/8"Metric
    43.7 mm
    0.1457"Square———000000000000000———0———0
    M5 × 0.8 mm15/16"2 3/8"Metric
    44.2 mm
    0.1653"Square00000000000000000000000000000000000030000000000000
    M6 × 1 mm1"2 1/2"Metric
    45 mm
    0.1968"Square00000000000000000000000000000000000030000000000000
    M7 × 1 mm1 1/8"2 23/32"Metric
    46 mm
    0.2362"Square00000000000000000000000000000000000000030000000000000
    M8 × 1 mm1 1/8"2 23/32"Metric
    46.9 mm
    0.2716"Square000000000000000000000000000000000000000000300000000000000
    M8 × 1.25 mm1 1/8"2 23/32"Metric
    46.7 mm
    0.2637"Square00000000000000000000000000000000000000030000000000000
    M10 × 1 mm1 1/4"2 15/16"Metric
    48.9 mm
    0.3503"Square0000000000000000000000000000000000000000003000000000000000
    M10 × 1.25 mm1 1/4"2 15/16"Metric
    48.7 mm
    0.3425"Square000000000000000000000000000000000000000000300000000000000
    M10 × 1.5 mm1 1/4"2 15/16"Metric
    48.5 mm
    0.3346"Square00000000000000000000000000000000000000030000000000000
    M12 × 1.25 mm1 21/32"3 3/8"Metric
    410.8 mm
    0.4251"Square000000000000000000000000000000000000000000300000000000000
    M12 × 1.5 mm1 21/32"3 3/8"Metric
    410.5 mm
    0.4134"Square0000000000000000000000000000000000000000003000000000000000
    M12 × 1.75 mm1 21/32"3 3/8"Metric
    410.2 mm
    0.4015"Square00000000000000000000000000000000000000030000000000000
    M14 × 1 mm1 21/32"3 19/32"Metric
    413 mm
    0.5118"Square0000000000000000000000000000000000000000003000000000000000
    M14 × 1.5 mm1 21/32"3 19/32"Metric
    412.5 mm
    0.4921"Square000000000000000000000000000000000000000000300000000000000
    M14 × 2 mm1 21/32"3 19/32"Metric
    412 mm
    0.4724"Square000000000000000000000000000000000000000300000000000000
    M16 × 1 mm1 13/16"3 13/16"Metric
    415 mm
    0.5905"Square0000000000000000000000000000000000000000003000000000000000
    M16 × 1.5 mm1 13/16"3 13/16"Metric
    414.5 mm
    0.5709"Square000000000000000000000000000000000000000000300000000000000
    M16 × 2 mm1 13/16"3 13/16"Metric
    414 mm
    0.5512"Square000000000000000000000000000000000000000300000000000000
    M18 × 1.5 mm1 13/16"4 1/32"Metric
    416.5 mm
    0.6496"Square0000000000000000000000000000000000000000003000000000000000
    M18 × 2.5 mm1 13/16"4 1/32"Metric
    415.5 mm
    0.6102"Square———000000000000000000000000000300000000000000
    M20 × 1.5 mm2"4 15/32"Metric
    447/64"
    0.7344"Square0000000000000000000000000000000000000000003000000000000000
    M20 × 2 mm2"4 15/32"Metric
    418 mm
    0.7087"Square0000000000000000000000000000000000000000000003000000000000000
    M20 × 2.5 mm2"4 15/32"Metric
    417.5 mm
    0.689"Square000000000000000000000000000000000000000300000000000000
    M22 × 1.5 mm2 7/32"4 11/16"Metric
    420 mm0.7874"Square000000000000000000000000000000000000000000———0
    M22 × 2.5 mm2 7/32"4 11/16"Metric
    425/32"
    0.7813"Square0000000000000000000000000000———0———0
    M24 × 2 mm2 7/32"4 29/32"Metric
    422 mm
    0.8661"Square———0000000000000000000000000000000———0
    M24 × 3 mm2 7/32"4 15/16"Metric
    421 mm
    0.8268"Square000000000000000000000000000000000000000300000000000000
     

    Left-Hand Thread Tap Sets

    Three chamfer types in one set create a snug fit with left-hand fasteners that secure counter-clockwise rotating parts. Left-hand threads keep components such as flywheels and propellers from loosening and spinning off. These taps have straight flutes that are good for most jobs.
    High-Speed Steel—Single Thread Size Sets
    Image of Product. Front orientation. Taps. Left-Hand Thread Tap Sets.
    The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic. These sets include one of each chamfer type: Taper for starting holes and threading through holes; plug for through holes and blind holes; and bottoming for cutting the closest to the bottom of any hole.
    Uncoated—The economical choice, these won't last as long as coated taps.
    Taper Chamfer, Plug
    Chamfer, Bottoming Chamfer
    No. of
    Pieces
    Tap Sizes
    Included
    Thread
    Type
    No. of
    Flutes
    Shank
    Type
    Each
    Uncoated
    38-32UNC
    4Square00000000000000
    310-32UNF
    4Square0000000000000
    31/4"-20UNC
    4Square0000000000000
    31/4"-28UNF
    4Square0000000000000
    31/4"-40UNS
    4Square00000000000000
    35/16"-18UNC
    4Square0000000000000
    35/16"-20UNS
    4Square00000000000000
    35/16"-24UNF
    4Square0000000000000
    33/8"-16UNC
    4Square0000000000000
    33/8"-24UNF
    4Square0000000000000
    31/2"-13UNC
    4Square0000000000000
    31/2"-20UNF
    4Square0000000000000
    39/16"-20UNS
    4Square00000000000000
    311/16"-16UNF
    4Square00000000000000
    311/16"-18UNS
    6Square00000000000000
    37/8"-18UNS
    6Square00000000000000
    31"-8UNC
    4Square00000000000000
    31"-12UNF
    4Square00000000000000
    31"-14UNS
    4Square00000000000000
    31"-16UNS
    6Square00000000000000
    31"-20UNS
    6Square00000000000000
    31 1/8"-7UNC
    4Square00000000000000
    31 1/8"-12UNF
    4Square00000000000000
    31 1/4"-7UNC
    4Square00000000000000
    31 1/4"-12UNF
    4Square00000000000000
    31 1/2"-6UNC
    4Square00000000000000
    31 1/2"-12UNF
    6Square00000000000000
    3M4Metric
    4Square0000000000000
    3M5Metric
    4Round0000000000000
    3M6Metric
    4Square0000000000000
    3M7Metric
    4Square0000000000000
    3M8Metric
    4Square00000000000000
    3M8Metric
    4Square0000000000000
    3M10Metric
    4Square000000000000000
    3M10Metric
    4Square00000000000000
    3M10Metric
    4Square0000000000000
    3M12Metric
    4Square00000000000000
    3M12Metric
    4Square000000000000000
    3M12Metric
    4Square0000000000000
    3M14Metric
    4Square000000000000000
    3M14Metric
    4Square00000000000000
    3M14Metric
    4Square00000000000000
    3M16Metric
    4Square000000000000000
    3M16Metric
    4Square00000000000000
    3M16Metric
    4Square00000000000000
    3M18Metric
    4Square000000000000000
    3M18Metric
    4Square00000000000000
    3M20Metric
    4Square000000000000000
    3M20Metric
    4Square000000000000000
    3M20Metric
    4Square00000000000000
    3M24Metric
    4Square00000000000000
     

    Left-Hand Thread Chip-Clearing Taps

    Chips won't slow you down when creating threads to join counter-clockwise rotating parts. Left-hand threads keep components such as flywheels and propellers from loosening and spinning off. These taps force chips through the hole so there’s no buildup to damage the threads or the tap. Since you don’t need to reverse taps to extract chips, they also form threads faster than standard left-hand taps.
    High-Speed Steel—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.
    Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.
    Titanium Carbon Nitride (TiCN) Coated—Resist heat, chipping, and wear for three times the life of uncoated taps.
    Spiral-Point Flute for Through Holes—Push chips ahead of the tap and out of through holes. Also known as gun taps.
    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-Point Flute
    for Through Holes
    Thread
    Size
    Thread
    Lg.
    Overall
    Lg.
    Thread
    Type
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Chamfer
    Type
    No. of
    Flutes
    Each
    High-Speed Steel
     
    Image of ProductInUse. Front orientation. Taps. Left-Hand Thread Chip-Clearing Taps, Spiral-Point Flute for Through Holes.

    Spiral-Point Flute for Through Holes

    Uncoated
    5-40
    5/8"1 15/16"UNC
    38 Ga.
    0.1015"SquarePlug200000000000000
    6-32
    11/16"2"UNC
    36 Ga.
    0.1065"SquarePlug20000000000000
    8-32
    3/4"2 1/8"UNC
    29 Ga.
    0.136"SquarePlug20000000000000
    10-24
    7/8"2 3/8"UNC
    25 Ga.
    0.1495"SquarePlug20000000000000
    10-32
    7/8"2 3/8"UNF
    21 Ga.
    0.159"SquarePlug20000000000000
    1/4"-20
    1"2 1/2"UNC
    7 Ga.
    0.201"SquarePlug20000000000000
    1/4"-28
    1"2 1/2"UNF
    3 Ga.
    0.213"SquarePlug20000000000000
    5/16"-18
    1 1/8"2 23/32"UNC
    F
    0.257"SquarePlug20000000000000
    5/16"-24
    1 1/8"2 23/32"UNF
    I
    0.272"SquarePlug20000000000000
    3/8"-16
    1 1/4"2 15/16"UNC
    5/16"
    0.3125"SquarePlug30000000000000
    3/8"-24
    1 1/4"2 15/16"UNF
    Q
    0.332"SquarePlug30000000000000
    7/16"-14
    1 7/16"3 5/32"UNC
    U
    0.368"SquarePlug30000000000000
    1/2"-13
    1 21/32"3 3/8"UNC
    27/64"
    0.4219"SquarePlug30000000000000
    1/2"-20
    1 21/32"3 3/8"UNF
    29/64"
    0.4531"SquarePlug30000000000000
    5/8"-11
    1 13/16"3 13/16"UNC
    17/32"
    0.5313"SquarePlug30000000000000
     
    Image of ProductInUse. Front orientation. Taps. Left-Hand Thread Chip-Clearing Taps, Spiral-Point Flute for Through Holes.

    Spiral-Point Flute for Through Holes

    Titanium Nitride (TiN) Coated
    5-40
    5/8"1 15/16"UNC
    38 Ga.
    0.1015"SquarePlug20000000000000
    6-32
    11/16"2"UNC
    36 Ga.
    0.1065"SquarePlug20000000000000
    8-32
    3/4"2 1/8"UNC
    29 Ga.
    0.136"SquarePlug20000000000000
    10-24
    7/8"2 3/8"UNC
    25 Ga.
    0.1495"SquarePlug20000000000000
    10-32
    7/8"2 3/8"UNF
    21 Ga.
    0.159"SquarePlug20000000000000
    1/4"-20
    1"2 1/2"UNC
    7 Ga.
    0.201"SquarePlug20000000000000
    1/4"-28
    1"2 1/2"UNF
    3 Ga.
    0.213"SquarePlug20000000000000
    5/16"-18
    1 1/8"2 23/32"UNC
    F
    0.257"SquarePlug20000000000000
    5/16"-24
    1 1/8"2 23/32"UNF
    I
    0.272"SquarePlug20000000000000
    3/8"-16
    1 1/4"2 15/16"UNC
    5/16"
    0.3125"SquarePlug30000000000000
    3/8"-24
    1 1/4"2 15/16"UNF
    Q
    0.332"SquarePlug30000000000000
    7/16"-14
    1 7/16"3 5/32"UNC
    U
    0.368"SquarePlug30000000000000
    1/2"-13
    1 21/32"3 3/8"UNC
    27/64"
    0.4219"SquarePlug30000000000000
    1/2"-20
    1 21/32"3 3/8"UNF
    29/64"
    0.4531"SquarePlug30000000000000
    5/8"-11
    1 13/16"3 13/16"UNC
    17/32"
    0.5313"SquarePlug30000000000000
     
    Image of ProductInUse. Front orientation. Taps. Left-Hand Thread Chip-Clearing Taps, Spiral-Point Flute for Through Holes.

    Spiral-Point Flute for Through Holes

    Titanium Carbon Nitride (TiCN) Coated
    5-40
    5/8"1 15/16"UNC
    38 Ga.
    0.1015"SquarePlug20000000000000
    6-32
    11/16"2"UNC
    36 Ga.
    0.1065"SquarePlug20000000000000
    8-32
    3/4"2 1/8"UNC
    29 Ga.
    0.136"SquarePlug20000000000000
    10-24
    7/8"2 3/8"UNC
    25 Ga.
    0.1495"SquarePlug20000000000000
    10-32
    7/8"2 3/8"UNF
    21 Ga.
    0.159"SquarePlug20000000000000
    1/4"-20
    1"2 1/2"UNC
    7 Ga.
    0.201"SquarePlug20000000000000
    1/4"-28
    1"2 1/2"UNF
    3 Ga.
    0.213"SquarePlug20000000000000
    5/16"-18
    1 1/8"2 23/32"UNC
    F
    0.257"SquarePlug20000000000000
    5/16"-24
    1 1/8"2 23/32"UNF
    I
    0.272"SquarePlug20000000000000
    3/8"-16
    1 1/4"2 15/16"UNC
    5/16"
    0.3125"SquarePlug30000000000000
    3/8"-24
    1 1/4"2 15/16"UNF
    Q
    0.332"SquarePlug30000000000000
    7/16"-14
    1 7/16"3 5/32"UNC
    U
    0.368"SquarePlug30000000000000
    1/2"-13
    1 21/32"3 3/8"UNC
    27/64"
    0.4219"SquarePlug300000000000000
    1/2"-20
    1 21/32"3 3/8"UNF
    29/64"
    0.4531"SquarePlug300000000000000
    5/8"-11
    1 13/16"3 13/16"UNC
    17/32"
    0.5313"SquarePlug300000000000000
     
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