1"-12 Dies | McMaster-Carr

Rotate these dies around studs and rods to create new fastener threads. A cut above lower-quality dies that can leave inferior threads, these are machined in the U.S. to precise dimensions for accuracy and consistency.

They are adjustable, so you can cut a shallow thread that makes it easier to get the die started on the first pass. Turn the set screw to open the die to its largest diameter. Then rotate the die with a round die wrench and adjust the screw as you make additional passes to reach the proper thread size.

Uncoated Carbon Steel—Our most economical dies, these are good for jobs that pop up. They work on most metal and plastic but will dull faster than high-speed steel dies.

Uncoated High-Speed Steel—The most versatile dies stay sharp and cut cleanly, even if you use them every day. They last much longer than carbon steel dies and you won’t have to work as hard to create threads.

Titanium Nitride (TiN)-Coated High-Speed Steel—When you regularly work on challenging metals like stainless steel, choose dies with a TiN coating that reduces friction and resists heat. They turn faster and last longer than uncoated dies.

	Dies								Die Wrenches
			Uncoated Carbon Steel		Uncoated High-Speed Steel		Titanium Nitride (TiN)-Coated High-Speed Steel
	Thread Size	Thread Type		Each		Each		Each		Each
2" OD



		1"-12	UNF	2576A266	000000	2602A395	000000	8349A43	0000000	25565A25	000000


		2 1/2" OD



				1"-12	UNF	2576A747	000000	———	0	———	0	25565A26	00000


				3" OD



						1"-12	UNF	2576A749	000000	———	0	———	0	25565A27	00000

Thread-Repairing Dies

Rescue mangled threads and return them to like-new condition. By repairing threads, you don’t have to replace the fastener or resize holes. These dies smooth out flaws and remove rust so threads engage properly and connections stay strong. Turn them with a hex die wrench or a standard adjustable wrench.

Don’t risk damaging threads further with an inferior-quality die. Our dies are machined in the U.S. to precise dimensions for a perfect thread profile.

Uncoated Carbon Steel—Hard and wear resistant for a long life, these dies work well on both metal and plastic.

			Uncoated Carbon Steel
Thread Size	Thread Type	Wd.		Each
1"-12	UNF	1 13/16"	2573A42	000000

Left-Hand Thread-Repairing Dies

Repair instead of replacing left-hand fasteners, which can be expensive and hard to find. These dies correct flaws and clean out rust so the threads engage properly. Don’t risk damaging threads further with an inferior quality die. Our dies are machined in the U.S. to precise dimensions for a perfect thread profile. Turn them with a hex die wrench or a standard adjustable wrench.

Uncoated Carbon Steel—Hard and wear resistant for a long life, these dies work well on both metal and plastic.

			Uncoated Carbon Steel
Thread Size	Thread Type	Wd.		Each
1"-12	UNF	1 13/16"	2560A61	000000