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)
    19 Products

    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"5277N110000000
    No. 6
    		3217/64"2 1/2"31/4"5277N12000000
    No. 8
    		3217/64"2 1/2"31/4"5277N13000000
    No. 10
    		2411/32"2 1/2"31/4"5277N14000000
    No. 10
    		3221/64"2 1/2"31/4"5277N15000000
    1/4"
    		2033/64"2 1/2"31/4"5277N16000000
    5/16"
    		185/8"2 1/2"31/4"5277N17000000
    3/8"
    		1625/32"3"45/16"5277N18000000
    1/2"
    		137/8"3"43/8"5277N19000000
     
    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"4425N11000000
    No. 4
    		48 to 802"3/16"0.045"4425N1200000
    No. 6
    		32 to 562"3/16"0.049"4425N1300000
    No. 8
    		32 to 562"3/16"0.07"4425N1400000
    No. 10
    		28 to 482"3/16"0.075"4425N1500000
    No. 12
    		24 to 482"3/16"0.08"4425N1600000
    1/4"
    		24 to 482 1/2"1/4"0.104"4425N1700000
    5/16"
    		16 to 482 1/2"1/4"0.153"4425N1800000
    3/8"
    		18 to 483"3/8"0.192"4425N1900000
    1/2"
    		12 to 483"3/8"0.24"4425N2100000
     
    back to top