Thread Mills

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29 Products

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.

Thread mills cut internal UNC, UNEF, UNF, UNJ, or UNS threads, but the threads they create have a fixed pitch.

	Threads per In.	Thread Lg.	Overall Lg.	No. of Flutes	Shank Size		Each
Aluminum Titanium Nitride (AlTiN)-Coated Carbide


	No. 4	40	3/16"	2 1/2"	2	1/4"	5277N11	0000000
	No. 6	32	17/64"	2 1/2"	3	1/4"	5277N12	000000
	No. 8	32	17/64"	2 1/2"	3	1/4"	5277N13	000000
	No. 10	24	11/32"	2 1/2"	3	1/4"	5277N14	000000
	No. 10	32	21/64"	2 1/2"	3	1/4"	5277N15	000000
	1/4"	20	33/64"	2 1/2"	3	1/4"	5277N16	000000
	5/16"	18	5/8"	2 1/2"	3	1/4"	5277N17	000000
	3/8"	16	25/32"	3"	4	5/16"	5277N18	000000
	1/2"	13	7/8"	3"	4	3/8"	5277N19	000000

For Internal Threads (Metric)

Thread mills cut internal metric threads, but the threads they create have a fixed pitch.

	Thread Pitch, mm	Thread Lg.	Overall Lg.	No. of Flutes	Shank Size		Each
Aluminum Titanium Nitride (AlTiN)-Coated Carbide


	M5	0.8	21/64"	2 9/32"	3	0.2362"	5277N21	0000000
	M6	1	31/64"	2 9/32"	3	0.2362"	5277N22	000000
	M8	1.25	21/32"	2 9/32"	3	0.2362"	5277N23	000000

For External Threads (UNJ)

Thread mills cut external UNJ threads with a single point, producing rounded threads that are commonly used for high-stress fastening applications involving heavy loads and high pressures. Each cuts a single thread pitch.

	Overall Lg.	Shank Size	Neck Dia.		Each
Aluminum Titanium Nitride (AlTiN)-Coated Carbide


	12	3 1/2"	1/2"	0.34"	6210N17	0000000
	16	3"	3/8"	0.24"	6210N16	000000
	18	3"	3/8"	0.24"	6210N15	000000
	20	3"	3/8"	0.24"	6210N14	000000
	24	3"	3/8"	0.24"	6210N13	000000
	28	3"	3/8"	0.24"	6210N12	000000
	32	3"	3/8"	0.24"	6210N11	000000

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.

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.

	Threads per In.	Overall Lg.	Shank Size	Neck Dia.		Each
Aluminum Titanium Nitride (AlTiN)-Coated Carbide


	No. 2	56 to 80	1 1/2"	1/8"	0.034"	4425N11	000000
	No. 4	48 to 80	2"	3/16"	0.045"	4425N12	00000
	No. 6	32 to 56	2"	3/16"	0.049"	4425N13	00000
	No. 8	32 to 56	2"	3/16"	0.07"	4425N14	00000
	No. 10	28 to 48	2"	3/16"	0.075"	4425N15	00000
	No. 12	24 to 48	2"	3/16"	0.08"	4425N16	00000
	1/4"	24 to 48	2 1/2"	1/4"	0.104"	4425N17	00000
	5/16"	16 to 48	2 1/2"	1/4"	0.153"	4425N18	00000
	3/8"	18 to 48	3"	3/8"	0.192"	4425N19	00000
	1/2"	12 to 48	3"	3/8"	0.24"	4425N21	00000