McMaster-Carr logo
    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)
    Help me decide (beta)
    55 Products

    For Threading

    Thread Direction

    Acme Thread Taps

    Image of Product. Front orientation. Taps. Acme Thread Taps.
    Create the broad Acme threads found on lead screw nuts, linear actuators, vises, and other moving components. These taps have two sets of chamfered threads: the first for cutting a rough profile and the second for finishing it. They’re only for through holes since the two different threads can damage the workpiece if you reverse the tap. Once done threading, release the tap from the holder and remove it from the other side of the hole. Also known as tandem taps.
    High-Speed Steel—These taps resist heat and wear to stay sharp.
    Drill Bit
    Thread
    Size
    Thread
    Lg.
    Overall
    Lg.
    Thread
    Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Mfr.
    Each
    High-Speed Steel
     
    Uncoated
    1/4"-16
    		1 3/4"3"Acme
    		410 Ga.
    		0.1935"SquareWidell Industries25345A410000000
    3/8"-12
    		2 1/8"4 1/16"Acme
    		47.6 mm
    		0.2992"SquareWidell Industries25345A42000000
    7/16"-12
    		2 9/16"5"Acme
    		423/64"
    		0.3594"SquareWidell Industries25345A93000000
    1/2"-10
    		2 9/16"5"Acme
    		413/32"
    		0.4063"SquareWidell Industries25345A55000000
    5/8"-8
    		3 3/16"6 1/4"Acme
    		413 mm
    		0.5118"SquareWidell Industries25345A56000000
    5/8"-10
    		3 3/16"6 1/4"Acme
    		417/32"
    		0.5313"SquareWidell Industries25345A11000000
    3/4"-5
    		4 5/16"7 15/16"Acme
    		414.5 mm
    		0.5709"SquareWidell Industries25345A14000000
    3/4"-6
    		4 5/16"7 15/16"Acme
    		439/64"
    		0.6094"SquareWidell Industries25345A57000000
    3/4"-8
    		4 5/16"7 15/16"Acme
    		441/64"
    		0.6406"SquareWidell Industries25345A17000000
    3/4"-10
    		4 5/16"7 15/16"Acme
    		421/32"
    		0.6563"SquareWidell Industries25345A21000000
    3/4"-16
    		4 5/16"7 15/16"Acme
    		411/16"
    		0.6875"SquareGWS25345A35000000
    7/8"-6
    		4 3/8"8 5/8"Acme
    		447/64"
    		0.7344"SquareWidell Industries25345A59000000
    1"-4
    		5 1/4"10 1/8"Acme
    		449/64"
    		0.7656"SquareWidell Industries25345A24000000
    1"-5
    		5 1/4"10 1/8"Acme
    		421 mm
    		0.8268"SquareWidell Industries25345A61000000
    1"-6
    		5 1/4"10 1/8"Acme
    		453/64"
    		0.833"SquareGWS25345A34000000
    1"-8
    		5 1/4"10 1/8"Acme
    		47/8"
    		0.875"SquareWidell Industries25345A96000000
    1"-10
    		5 1/4"10 1/8"Acme
    		429/32"
    		0.9063"SquareWidell Industries25345A27000000
    1 1/8"-5
    		5 1/4"10 3/4"Acme
    		424 mm
    		0.9449"SquareWidell Industries25345A62000000
    1 1/4"-4
    		5 1/4"11 1/8"Acme
    		41 1/64"
    		1.0156"SquareWidell Industries25345A31000000
    1 1/4"-5
    		5 1/4"11 1/8"Acme
    		41 5/64"
    		1.0781"SquareWidell Industries25345A63000000
    1 3/8"-4
    		5 7/8"12 1/4"Acme
    		41 9/64"
    		1.1406"SquareWidell Industries25345A83000000
    1 1/2"-4
    		5 7/8"12 5/8"Acme
    		432 mm
    		1.2598"SquareWidell Industries25345A65000000
    1 1/2"-5
    		5 7/8"12 5/8"Acme
    		41 19/64"
    		1.3"SquareGWS25345A36000000
     

    Trapezoidal Thread Taps

    Image of Product. Front orientation. Taps. Trapezoidal Thread Taps.
    The metric version of Acme thread taps. These cut the broad threads found on lead screw nuts, linear actuators, vises, and other moving components. They have two sets of chamfered threads: the first for cutting a rough profile and the second for finishing it. They’re only for through holes since the two different chamfers can damage the workpiece if you reverse the tap. Once done threading, release the tap from the holder and remove it from the other side of the hole. Also known as tandem taps.
    High-Speed Steel—These taps resist heat and wear to stay sharp.
    Drill Bit
    Thread
    Size
    Thread
    Lg.
    Overall
    Lg.
    Thread Type
    No. of
    Flutes
    Size,
    mm
    Decimal Size
    Equiv.
    Shank
    Type
    Mfr.
    Each
    High-Speed Steel
     
    Uncoated
    M10 × 2 mm2.56"5 1/8"Metric Trapezoidal
    		38
    		0.315"SquareGWS3200N110000000
    M12 × 3 mm2.56"5 1/8"Metric Trapezoidal
    		39
    		0.3543"SquareGWS3200N12000000
    M14 × 3 mm3.15"6 5/16"Metric Trapezoidal
    		411
    		0.4331"SquareGWS3200N13000000
    M16 × 4 mm3.15"6 5/16"Metric Trapezoidal
    		412
    		0.4724"SquareGWS3200N14000000
    M18 × 4 mm4.33"7 7/8"Metric Trapezoidal
    		414
    		0.5512"SquareGWS3200N15000000
    M20 × 4 mm4.33"8 3/4"Metric Trapezoidal
    		416
    		0.6299"SquareGWS3200N16000000
    M22 × 5 mm4.33"8 3/4"Metric Trapezoidal
    		417
    		0.6693"SquareGWS3200N17000000
    M24 × 5 mm5.31"10 1/4"Metric Trapezoidal
    		419
    		0.748"SquareGWS3200N18000000
    M26 × 5 mm5.31"10 1/4"Metric Trapezoidal
    		421
    		0.8268"SquareGWS3200N19000000
     

    Left-Hand Acme Thread Taps

    Image of Product. Front orientation. Taps. Left-Hand Acme Thread Taps.
    Prevent counter-clockwise rotating parts from loosening and spinning off. These taps thread holes to mate with left-hand Acme fasteners that secure components like lead screw nuts and linear actuators. They have two sets of chamfered threads: the first for cutting a rough profile and the second for finishing it. They’re only for through holes since the two different threads can damage the workpiece if you reverse the tap. Once done threading, release the tap from the holder and remove it from the other side of the hole. Also known as tandem taps.
    High-Speed Steel—These taps resist heat and wear to stay sharp.
    Drill Bit
    Thread
    Size
    Thread
    Lg.
    Overall
    Lg.
    Thread
    Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Mfr.
    Each
    High-Speed Steel
     
    Uncoated
    1/4"-16
    		1 3/4"3"Acme
    		410 Ga.
    		0.1935"SquareWidell Industries25345A430000000
    3/8"-12
    		2 1/8"4 1/16"Acme
    		47.6 mm
    		0.2992"SquareWidell Industries25345A44000000
    7/16"-12
    		2 9/16"5"Acme
    		423/64"
    		0.3594"SquareWidell Industries25345A94000000
    1/2"-10
    		2 9/16"5"Acme
    		413/32"
    		0.4063"SquareWidell Industries25345A45000000
    5/8"-8
    		3 3/16"6 1/4"Acme
    		413 mm
    		0.5118"SquareWidell Industries25345A46000000
    5/8"-10
    		3 3/16"6 1/4"Acme
    		417/32"
    		0.5313"SquareWidell Industries25345A47000000
    3/4"-5
    		4 5/16"7 15/16"Acme
    		414.5 mm
    		0.5709"SquareWidell Industries25345A48000000
    3/4"-6
    		4 5/16"7 15/16"Acme
    		439/64"
    		0.6094"SquareWidell Industries25345A49000000
    3/4"-8
    		4 5/16"7 15/16"Acme
    		441/64"
    		0.6406"SquareWidell Industries25345A51000000
    3/4"-10
    		4 5/16"7 15/16"Acme
    		421/32"
    		0.6563"SquareWidell Industries25345A52000000
    3/4"-16
    		4 5/16"7 15/16"Acme
    		411/16"
    		0.6875"SquareGWS25345A38000000
    7/8"-6
    		4 3/8"8 5/8"Acme
    		447/64"
    		0.7344"SquareWidell Industries25345A53000000
    1"-4
    		5 1/4"10 1/8"Acme
    		449/64"
    		0.7656"SquareWidell Industries25345A54000000
    1"-5
    		5 1/4"10 1/8"Acme
    		421 mm
    		0.8268"SquareWidell Industries25345A58000000
    1"-6
    		5 1/4"10 1/8"Acme
    		453/64"
    		0.833"SquareGWS25345A37000000
    1"-8
    		5 1/4"10 1/8"Acme
    		47/8"
    		0.875"SquareWidell Industries25345A97000000
    1"-10
    		5 1/4"10 1/8"Acme
    		429/32"
    		0.9063"SquareWidell Industries25345A66000000
    1 1/8"-5
    		5 1/4"10 3/4"Acme
    		424 mm
    		0.9449"SquareWidell Industries25345A81000000
    1 1/4"-4
    		5 1/4"11 1/8"Acme
    		41 1/64"
    		1.0156"SquareWidell Industries25345A82000000
    1 1/4"-5
    		5 1/4"11 1/8"Acme
    		41 5/64"
    		1.0781"SquareWidell Industries25345A91000000
    1 3/8"-4
    		5 7/8"12 1/4"Acme
    		41 9/64"
    		1.1406"SquareWidell Industries25345A89000000
    1 1/2"-4
    		5 7/8"12 5/8"Acme
    		432 mm
    		1.2598"SquareWidell Industries25345A92000000
    1 1/2"-5
    		5 7/8"12 5/8"Acme
    		41 19/64"
    		1.3"SquareGWS25345A39000000
     
    back to top