M18 Dies | McMaster-Carr

Plug Chamfer—Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper-chamfer taps. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

Taper Chamfer—Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes. However, a longer taper means that they cannot thread as close to the bottom of closed-end holes.

Hex—Hex-shaped dies are for thread repair and can be used with conventional wrenches.

	Die Shape	Die Sizes Included	Wd.	Container Type	Includes		Each
Carbon Steel Taps and Dies







	Right-Hand Thread

	25	M14 × 1.25 mm, M14 × 1.50 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm, M20 × 2.50 mm, M22 × 1.50 mm, M24 × 2.00 mm, M24 × 3.00 mm	Plug	Hex	M14 × 1.25 mm, M14 × 1.50 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm, M20 × 2.50 mm, M22 × 1.50 mm, M24 × 2.00 mm, M24 × 3.00 mm	1 7/16", 1 13/16"	Plastic Case	Die Wrench (2), Tap Wrench	00000000	0000000


	52	1/4"-19, 1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.25 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm	Plug, Taper	Hex	1/8"-28, 1/4"-19, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.25 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm	1", 1 7/16"	Plastic Case	Die Wrench (2), Tap Wrench (3), Thread Gauge	0000000	000000
	65	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.25 mm, M14 × 1.50 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm, M20 × 2.50 mm, M22 × 1.50 mm, M24 × 2.00 mm, M24 × 3.00 mm	Plug, Taper	Hex	1/8"-28, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.25 mm, M14 × 1.50 mm, M14 × 2.00 mm, M16 × 1.50 mm, M16 × 2.00 mm, M18 × 1.50 mm, M18 × 2.50 mm, M20 × 2.50 mm, M22 × 1.50 mm, M24 × 2.00 mm, M24 × 3.00 mm	5/8", 1", 1 3/16", 1 7/16", 1 13/16"	Plastic Case	Die Wrench (4), Tap Wrench (4), Thread Gauge	0000000	000000

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 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 High-Speed Steel		Titanium Nitride (TiN)-Coated High-Speed Steel
	Thread Size	Thread Type		Each		Each		Each
1 1/2" OD



		M18 × 1.5 mm	Metric	0000000	000000	———	0	00000000	000000


		M18 × 2 mm	Metric	0000000	00000	———	0	00000000	00000
		M18 × 2.5 mm	Metric	0000000	00000	———	0	00000000	00000


		2" OD



				M18 × 1.5 mm	Metric	———	0	0000000	0000000	00000000	00000


				M18 × 2.5 mm	Metric	———	0	0000000	000000	00000000	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
M18 × 1.5 mm	Metric	1 7/16"	00000000	000000
M18 × 2 mm	Metric	1 7/16"	0000000	00000
M18 × 2.5 mm	Metric	1 7/16"	0000000	00000

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.

	Dies				Die Wrenches
			Uncoated High-Speed Steel
	Thread Size	Thread Type		Each		Each
1 1/2" OD



		M18 × 1.5 mm	Metric	0000000	000000	00000000	000000


		M18 × 2.5 mm	Metric	0000000	00000	00000000	00000