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)
    31 Products

    For Threading

    For Threading

    Performance

    Pipe and Conduit Taps

    Add internal threads to pipe and conduit or components such as manifolds. They have straight flutes that are good for most jobs.
    BSPP ThreadAbout BSPP Thread
    Image of Product. Front orientation. Taps. Pipe and Conduit 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.
    Drill Bit
    Bottoming
    Chamfer
    Pipe
    Size
    Thread
    Lg.
    Overall
    Lg.
    No. of
    Flutes
    Threads
    per In.
    Size,
    mm
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    High-Speed Steel
     
    Uncoated
    1/8
    		3/4"2 1/8"4288.8
    		0.3464"Square0000000000000
    1/4
    		1 1/16"2 7/16"41911.8
    		0.4645"Square000000000000
    3/8
    		1 1/16"2 9/16"419150.5905"Square000000000000
    1/2
    		1 3/8"3 1/8"414190.748"Square000000000000
    3/4
    		1 3/8"3 1/4"514240.9449"Square000000000000
    1
    		1 3/4"3 3/4"511301.1811"Square0000000000000
    1 1/4
    		1 3/4"4"51139.5
    		1.5551"Square0000000000000
    1 1/2
    		1 3/4"4 1/4"71145
    		1.7716"Square0000000000000
    2
    		1 3/4"4 1/2"71157
    		2.244"Square0000000000000
     
    Titanium Nitride (TiN) Coated
    1/8
    		3/4"2 1/8"4288.8
    		0.3464"Square000000000000
    1/4
    		1 1/16"2 7/16"41911.8
    		0.4645"Square000000000000
    3/8
    		1 1/16"2 9/16"419150.5905"Square000000000000
    1/2
    		1 3/8"3 1/8"414190.748"Square000000000000
    3/4
    		1 3/8"3 1/4"414240.9449"Square000000000000
    1
    		1 3/4"3 3/4"611301.1811"Square000000000000
    1 1/4
    		1 3/4"4"61139.5
    		1.5551"Square0000000000000
    1 1/2
    		1 3/4"4 1/4"61145
    		1.7716"Square0000000000000
     

    Chip-Clearing Pipe and Conduit Taps for Steel and Stainless Steel

    Made of a high-vanadium alloy, these taps are harder and more wear-resistant than other high-speed steel taps. The widely spaced flutes prevent buildup that can ruin threads and keep pipe and conduit from making strong connections. Also known as interrupted-thread taps.
    BSPP ThreadAbout BSPP Thread
    Image of Product. Front orientation. Taps. Chip-Clearing Pipe and Conduit Taps for Steel and Stainless Steel.
    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.
    Drill Bit
    Bottoming
    Chamfer
    Pipe
    Size
    Thread
    Lg.
    Overall
    Lg.
    No. of
    Flutes
    Threads
    per In.
    Size,
    mm
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    High-Speed Steel
     
    Uncoated
    1/8
    		3/4"2 5/32"3288.8
    		0.3464"Square0000000000000
    1/4
    		1 3/32"2 7/16"31911.8
    		0.4646"Square000000000000
    3/8
    		1 3/32"2 9/16"31915.3
    		0.6024"Square000000000000
    1/2
    		1 3/8"3 9/64"314190.748"Square000000000000
     

    2-in-1 Pipe and Conduit Taps

    One tap threads holes in pipe and conduit from start to finish. Begin with the taper-chamfer end, which gradually engages with the material and requires minimal force to turn the tool. Then flip to the bottoming-chamfer end to thread all the way through the hole.
    BSPP ThreadAbout BSPP Thread
    Image of Product. Front orientation. Taps. 2-in-1 Pipe and Conduit Taps.
    Image of Attribute. End View. Side1 orientation.

    End View

    High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.
    Drill Bit
    Taper Chamfer,
    Bottoming Chamfer
    Pipe
    Size
    Thread
    Lg.
    Overall
    Lg.
    For Wrench
    Size, mm
    No. of
    Flutes
    Threads
    per In.
    Size,
    mm
    Decimal Size
    Equiv.
    For Hex Drive
    Size, mm
    Each
    High-Speed Steel
     
    Uncoated
    1/4
    		55/64"2 3/4"841911.8
    		0.4645"40000000000000
    3/8
    		55/64"2 3/4"1241915.3
    		0.6024"4000000000000
    1/2
    		15/16"3 9/64"15414190.748"60000000000000
    3/4
    		1 1/16"3 35/64"1941424.5
    		0.9646"80000000000000
    1
    		1 9/64"3 15/16"2441130.5
    		1.2008"100000000000000
     

    Pipe and Conduit Tap Sets

    Image of Product. Front orientation. Taps. Pipe and Conduit Tap Sets.
    A range of sizes for adding internal threads to pipe and conduit. These taps can also be used to thread components like manifolds. They have straight flutes that are good for most jobs.
    Carbon Steel—The economical choice for occasional hand tapping. These work on most metals and plastic but will dull more quickly than other taps.
    No. of
    Pieces
    Pipe Size
    Thread Type
    Chamfer
    Type
    No. of
    Flutes
    Container
    Type
    Shank
    Type
    Each
    Carbon Steel
    61/8, 1/4, 3/8, 1/2, 3/4, 1BSPP, MetricBottoming4, 5Fabric PouchSquare000000000000000
     

    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.
    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
    1/8
    		1 1/2"3 1/8"BSPP
    		425/64"
    		0.3906"Square000000000000000
    1/4
    		1 5/8"3 1/2"BSPP
    		417/32"
    		0.5313"Square00000000000000
    3/8
    		1 7/8"4"BSPP
    		443/64"0.6719"Square000000000000000
    1/2
    		2 1/4"4 7/8"BSPP
    		427/32"
    		0.8738"Square000000000000000
     
    back to top