1 1/4"-12 Dies | McMaster-Carr

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7 Products

Dies

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.

			Uncoated Carbon Steel		Uncoated High-Speed Steel		Die Wrenches
	Thread Size	Thread Type		Each		Each		Each
3" OD


		1 1/4"-12	UNF	00000000	0000000	00000000	0000000	00000000	000000

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. 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 1/4"-12	UNF	2 3/16"	0000000	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 1/4"-12	UNF	2 3/16"	0000000	000000

Thread-Repairing Die Nuts

If your wrench can turn a hex nut, it can turn these dies. They match the width of nuts of the same thread size, so you only need one tool to remove the nut, repair threads on the fastener, and put the nut back on. When space is tight, use dies with a ratcheting wrench since it requires minimal clearance to turn. Repairing dies remove imperfections and rust, resulting in threads that engage properly for a strong connection.

			Uncoated Carbon Steel
Thread Size	Thread Type	Wd.		Each
1 1/4"-12	UNF	1 3/4"	00000000	000000

Thread-Repairing Die Nut Sets

The dies in these sets match the width of hex nuts that are the same thread size, so one tool can turn both. For tight spaces, use with a ratcheting wrench since it requires minimal clearance to turn. Repairing dies remove imperfections and rust so threads engage properly for a strong connection.

	Thread Size	Thread Type	Wd.	Container Type		Each
Uncoated Carbon Steel


	5	3/4"-16, 7/8"-14, 1"-14, 1 1/8"-12, 1 1/4"-12	UNF, UNS	1 1/16", 1 1/4", 1 1/2", 1 5/8", 1 3/4"	Plastic Pouch	0000000	000000