Left-Handed Dies | McMaster-Carr

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Left-Hand Dies

Make your own threads instead of searching for left-hand fasteners, which can be expensive and hard to find. 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 create 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.

	Dies						Die Wrenches
			Uncoated Carbon Steel		Uncoated High-Speed Steel
	Thread Size	Thread Type		Each		Each		Each
13/16" OD



		6-32	UNC	2600A51	000000	2645A11	000000	25565A19	00000


		8-32	UNC	2600A52	00000	2645A12	00000	25565A19	0000
		10-24	UNC	2600A53	00000	2645A13	00000	25565A19	0000
		10-32	UNF	2600A54	00000	2645A14	00000	25565A19	0000
		1/4"-20	UNC	2600A55	00000	2645A15	00000	25565A19	0000
		1/4"-28	UNF	2600A56	00000	2645A16	00000	25565A19	0000
		5/16"-18	UNC	2600A57	00000	———	0	25565A19	0000
		5/16"-24	UNF	2600A58	00000	———	0	25565A19	0000
		3/8"-16	UNC	———	0	2645A17	00000	25565A19	0000
		3/8"-24	UNF	———	0	2645A18	00000	25565A19	0000


		1" OD



				6-32	UNC	2600A11	00000	2645A71	00000	25565A21	0000


				8-32	UNC	2600A12	00000	2645A72	00000	25565A21	0000
				10-24	UNC	2600A13	00000	2645A73	00000	25565A21	0000
				10-32	UNF	2600A14	00000	2645A74	00000	25565A21	0000
				1/4"-20	UNC	———	0	2645A75	00000	25565A21	0000
				1/4"-28	UNF	———	0	2645A76	00000	25565A21	0000
				5/16"-18	UNC	———	0	2645A77	00000	25565A21	0000
				5/16"-24	UNF	2600A18	00000	2645A78	00000	25565A21	0000
				3/8"-16	UNC	———	0	2645A79	00000	25565A21	0000
				3/8"-24	UNF	———	0	2645A81	00000	25565A21	0000
				1/2"-13	UNC	2600A24	00000	———	0	25565A21	0000


				1/2"-20	UNF	2600A25	00000	———	0	25565A21	0000
				M5 × 0.8 mm	Metric	———	0	2596A21	00000	25565A21	0000
				M6 × 1 mm	Metric	———	0	2596A22	00000	25565A21	0000
				M8 × 1.25 mm	Metric	———	0	2596A23	00000	25565A21	0000
				M10 × 1.5 mm	Metric	———	0	2596A24	00000	25565A21	0000
				M12 × 1.75 mm	Metric	———	0	2596A25	00000	25565A21	0000


				1 1/2" OD



						1/4"-20	UNC	2600A31	00000	2645A59	00000	25565A22	00000


						1/4"-28	UNF	2600A32	00000	2645A61	00000	25565A22	00000
						5/16"-18	UNC	2600A33	00000	———	0	25565A22	00000
						5/16"-24	UNF	2600A34	00000	———	0	25565A22	00000
						3/8"-16	UNC	2600A35	00000	2645A62	00000	25565A22	00000
						3/8"-24	UNF	2600A36	00000	2645A63	00000	25565A22	00000
						7/16"-14	UNC	2600A37	00000	2645A82	00000	25565A22	00000
						7/16"-20	UNF	2600A38	00000	2645A83	00000	25565A22	00000
						1/2"-13	UNC	2600A39	00000	2645A84	00000	25565A22	00000
						1/2"-20	UNF	2600A41	00000	2645A85	00000	25565A22	00000
						9/16"-18	UNF	———	0	2645A64	00000	25565A22	00000


						5/8"-11	UNC	———	0	2645A86	00000	25565A22	00000
5/8"-18						UNF	———	0	2645A87	00000	25565A22	00000
3/4"-10	UNC					———	0	2645A65	00000	25565A22	00000
3/4"-16	UNF					———	0	2645A66	00000	25565A22	00000
M10 × 1.5 mm	Metric					———	0	2596A41	00000	25565A22	00000
M12 × 1.75 mm	Metric					———	0	2596A42	00000	25565A22	00000
M14 × 2 mm	Metric					———	0	2596A43	00000	25565A22	00000
M16 × 2 mm	Metric					———	0	2596A44	00000	25565A22	00000
M18 × 1.5 mm	Metric					———	0	2596A45	00000	25565A22	00000
M18 × 2.5 mm	Metric					———	0	2596A46	00000	25565A22	00000


M20 × 2.5 mm	Metric					———	0	2596A32	00000	25565A22	00000


2" OD



						5/8"-11	UNC	2600A61	00000	2645A91	00000	25565A25	00000


		5/8"-18	UNF			2600A62	00000	2645A67	00000	25565A25	00000
		3/4"-10	UNC			2600A63	00000	2645A89	00000	25565A25	00000
		3/4"-16	UNF			2600A64	00000	2645A68	00000	25565A25	00000
		1"-8	UNC			———	0	2645A69	00000	25565A25	00000

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
1/4"-20	UNC	19/32"	2560A31	000000
1/4"-28	UNF	19/32"	2560A51	00000
5/16"-18	UNC	11/16"	2560A32	00000
5/16"-24	UNF	11/16"	2560A52	00000
3/8"-24	UNF	25/32"	2560A53	00000
7/16"-14	UNC	7/8"	2560A34	00000
7/16"-20	UNF	7/8"	2560A54	00000
1/2"-13	UNC	1 1/16"	2560A35	00000
1/2"-20	UNF	1 1/16"	2560A55	00000
9/16"-12	UNC	1 1/16"	2560A36	00000
9/16"-18	UNF	1 1/16"	2560A56	00000
5/8"-11	UNC	1 1/4"	2560A37	00000
5/8"-18	UNF	1 1/4"	2560A57	00000
11/16"-11	UNS	1 7/16"	2560A42	00000
11/16"-16	UNS	1 7/16"	2560A43	00000
3/4"-10	UNC	1 7/16"	2560A38	00000
3/4"-16	UNF	1 7/16"	2560A58	00000
7/8"-9	UNC	1 5/8"	2560A39	00000
7/8"-14	UNF	1 5/8"	2560A59	00000
1"-8	UNC	1 13/16"	2560A41	00000
1"-12	UNF	1 13/16"	2560A61	00000
1"-14	UNS	1 13/16"	2560A62	00000
1 1/8"-7	UNC	2"	2560A63	00000
1 1/8"-12	UNF	2"	2560A67	00000
1 1/4"-7	UNC	2 3/16"	2560A64	00000
1 1/4"-12	UNF	2 3/16"	2560A68	00000
1 3/8"-6	UNC	2 3/8"	2560A65	00000
1 3/8"-12	UNF	2 3/8"	2560A69	00000
1 1/2"-6	UNC	2 9/16"	2560A66	00000
1 1/2"-12	UNF	2 9/16"	2560A71	00000
M6 × 1 mm	Metric	11/16"	2573A982	00000
M8 × 1.25 mm	Metric	11/16"	2573A983	00000
M10 × 1.25 mm	Metric	7/8"	2573A984	00000
M10 × 1.5 mm	Metric	7/8"	2573A985	00000
M12 × 1.5 mm	Metric	1 1/16"	2573A986	00000
M12 × 1.75 mm	Metric	1 1/16"	2573A987	00000
M14 × 1.5 mm	Metric	1 1/16"	2573A988	00000
M14 × 2 mm	Metric	1 1/16"	2573A989	00000
M16 × 1.5 mm	Metric	1 1/4"	2573A991	00000
M16 × 2 mm	Metric	1 1/4"	2573A993	00000

Left-Hand Thread-Repairing Die Nut Sets

Repair a range of left-hand thread sizes with the same wrenches used to remove nuts. The dies in these sets match the width of hex nuts with the same thread size, so one tool can turn both. By repairing left-hand fasteners, you avoid the hassle and cost of replacing them. Dies smooth damage and clean threads to ensure connections stay secure.

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



	7	1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11	UNC	7/16", 1/2", 9/16", 11/16", 3/4", 7/8", 15/16"	Plastic Pouch	2667A15	000000


	7	1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, 5/8"-18	UNF	7/16", 1/2", 9/16", 11/16", 3/4", 7/8", 15/16"	Plastic Pouch	2667A16	00000

Left-Hand Thread-Repairing Die Nuts

Renew left-hand threaded bolts and rods using the same tool that turns hex nuts. These dies match the width of nuts with the same thread size, so you only need one wrench to remove the nut, repair threads, and put the nut back on. By repairing left-hand fasteners, you avoid the hassle and cost of replacing them. Dies smooth damage and clean threads to ensure connections stay strong.

			Uncoated Carbon Steel
Thread Size	Thread Type	Wd.		Each
1/4"-20	UNC	7/16"	2667A461	00000
1/4"-28	UNF	7/16"	2667A471	0000
5/16"-18	UNC	1/2"	2667A462	0000
5/16"-24	UNF	1/2"	2667A472	0000
3/8"-16	UNC	9/16"	2667A463	0000
3/8"-24	UNF	9/16"	2667A473	0000
7/16"-14	UNC	11/16"	2667A464	0000
7/16"-20	UNF	11/16"	2667A474	0000
1/2"-13	UNC	3/4"	2667A465	0000
1/2"-20	UNF	3/4"	2667A475	0000
9/16"-12	UNC	7/8"	2667A466	0000
9/16"-18	UNF	7/8"	2667A476	0000
5/8"-11	UNC	15/16"	2667A467	0000
5/8"-18	UNF	15/16"	2667A477	0000

Ridgid Pipe Threader Dies for Steel

Use these dies with Ridgid pipe threader die heads on Ridgid pipe threaders.

High-Speed Steel—High-speed steel dies last longer than alloy steel dies when used to cut similar material.

					High-Speed Steel
	For Pipe Size	For Threads per In.	For Pipe Threader Model No.	No. of Pieces		Each
For NPT Left-Hand Thread







				For Die Head Model Numbers 0-R, 00-R, 11-R, 111-R, 12-R, 30-A, 31-A

				1/2	14	00-R, 11-R, 12-R, 700	4	2536A984	0000000


				3/4	14	00-R, 11-R, 12-R, 700	4	2536A985	000000
				1	11 1/2	00-R, 11-R, 12-R, 700	4	2536A986	000000