M2 Threaded Rods | McMaster-Carr

With a tensile strength of 50,000 psi or 60,000 psi, these rods are often used to suspend light fixtures, cable trays, and conduit from ceilings. They're about half the strength of medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also low-strength steel.

Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these rods to rust.

	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel







	M2 × 0.4 mm

	50 mm	50,000	Rockwell B49	DIN 976	1	94595A211	00000


	300 mm	50,000	Rockwell B49	DIN 976	1	94595A212	0000
	1 m	50,000	Rockwell B49	DIN 976	1	93000A611	0000


	Steel







					M2 × 0.4 mm

					1 m	50,000	Rockwell B49	DIN 976	1	98861A010	0000

Stainless Steel

More corrosion resistant than steel rods and comparable in strength to low-strength steel.

18-8 Stainless Steel—The choice for wet and outdoor environments, these rods resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these rods won't degrade when exposed to harsh weather, salt water, and most chemicals.

	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	M2 × 0.4 mm

	12 mm	70,000	Not Rated	DIN 976	10	93805A621	000000


	16 mm	70,000	Not Rated	DIN 976	10	93805A622	00000
	20 mm	70,000	Not Rated	DIN 976	10	93805A623	00000
	25 mm	70,000	Not Rated	DIN 976	10	93805A624	00000
	50 mm	70,000	Not Rated	DIN 976	10	93805A110	00000
	300 mm	70,000	Not Rated	DIN 976	1	90024A210	0000
	500 mm	70,000	Not Rated	DIN 976	1	90024A211	0000
	1 m	70,000	Not Rated	DIN 976	1	90024A212	00000
	2 m	70,000	Not Rated	DIN 976	1	90024A213	00000


	Highly Corrosion-Resistant 316 Stainless Steel







					M2 × 0.4 mm

					12 mm	70,000	Not Rated	DIN 976	5	98863A526	00000


					25 mm	70,000	Not Rated	DIN 976	5	98863A527	00000
					300 mm	70,000	Not Rated	DIN 976	1	94185A571	0000
					500 mm	70,000	Not Rated	DIN 976	1	94185A572	00000
					1 m	70,000	Not Rated	DIN 976	1	94185A135	00000

Brass

Brass—Conductive and nonmagnetic, brass rods are commonly used to secure electrical equipment, such as circuit board assemblies and mounting brackets, inside enclosures.

	Specs. Met		Each
Brass







	M2 × 0.4 mm

	1	50,000	Rockwell B55	DIN 976	90162A030	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts


	Style B	Style C	Style D

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size and number of thread starts.

Lead Screw—Right-Hand Thread

303 Stainless Steel—303 stainless steel lead screws have good corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

	Lg., mm	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
303 Stainless Steel



	M2 × 0.5 mm	50	Metric Rounded Trapezoidal	2:1	2	1	±0.089 mm/300 mm	Brinell 160	90,000	97783A110	000000


	M2 × 0.5 mm	100	Metric Rounded Trapezoidal	2:1	2	1	±0.089 mm/300 mm	Brinell 160	90,000	97783A120	00000


	17-4 PH Stainless Steel



			M2 × 0.4 mm	145	Metric Rounded Trapezoidal	2:1	2	0.75	±0.15 mm/300 mm	Rockwell C35	145,000	4537N101	000000


			M2 × 0.4 mm	145	Metric Rounded Trapezoidal	4:1	4	1.5	±0.15 mm/300 mm	Rockwell C35	145,000	4537N102	000000
			M2 × 0.4 mm	145	Metric Rounded Trapezoidal	8:1	8	3	±0.15 mm/300 mm	Rockwell C35	145,000	4537N103	000000

Lead Screw with One Machinable End—Right-Hand Thread

Image of Product. Front orientation. Precision Lead Screws and Nuts. Metric Fast-Travel Ultra-Precision Lead Screws and Nuts, Lead Screw with One Machinable End—Right-Hand Thread.

Lead screws with one machinable end let you create your own custom connection to suit your application.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	7	25	2:1	2	0.75	±0.15 mm/300 mm	Rockwell C35	145,000	4537N121	0000000


		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	7	25	4:1	4	1.5	±0.15 mm/300 mm	Rockwell C35	145,000	4537N122	000000
		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	7	25	8:1	8	3	±0.15 mm/300 mm	Rockwell C35	145,000	4537N123	000000

Lead Screw with One Coupling End—Right-Hand Thread

Lead screws with one coupling end connect directly with your shaft without extra machining. Torque down the locknut once inserted.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	For Shaft Dia.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	6.5	15	2	2:1	2	0.75	±0.15 mm/300 mm	Rockwell C35	145,000	4537N141	0000000


		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	6.5	15	2	4:1	4	1.5	±0.15 mm/300 mm	Rockwell C35	145,000	4537N142	000000
		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	6.5	15	2	8:1	8	3	±0.15 mm/300 mm	Rockwell C35	145,000	4537N143	000000

Externally Threaded Nuts—Right-Hand Thread


Style B	Style C

Acetal—Acetal nuts have good wear and corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

												External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Dia.	Hex Wd.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
Acetal



		B	M2 × 0.5 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	2:1	2	1	3/8"-24	3/16"	Not Rated	8,000	10	-40 to 185	97783A190	000000


		PEEK



				C	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	2:1	2	0.75	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	4537N161	00000


				C	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	4:1	4	1.5	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	4537N162	00000
				C	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	8:1	8	3	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	4537N163	00000

Flange Nuts—Right-Hand Thread


Style D	Style D

Acetal—Acetal nuts have good wear and corrosion resistance.

Wear-Compensating Internal O-Ring—Flange nuts with a wear-compensating internal O-ring resist backlash to keep the nuts in place and maintain a tight fit even when their threads begin to wear. They’re often used in 3D printing and robotic applications.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

					Flange
	Style	Thread Size	Lg.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes	Temp., ° F		Each
Acetal



		D	M2 × 0.5 mm	1/2"	0.297"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	2:1	39/64"	2	1	Not Rated	8,000	10	2	-40 to 185	97783A240	000000


		PEEK



				D	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	2:1	11/32"	2	0.75	Durometer 83D	Not Rated	2	2	—	4537N181	00000


				D	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	4:1	11/32"	4	1.5	Durometer 83D	Not Rated	2	2	—	4537N182	00000
				D	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	8:1	11/32"	8	3	Durometer 83D	Not Rated	2	2	—	4537N183	00000


				PEEK with Wear-Compensating Internal O-Ring



						D	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	2:1	11/32"	2	0.75	Durometer 83D	Not Rated	1	2	—	4537N201	00000


						D	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	4:1	11/32"	4	1.5	Durometer 83D	Not Rated	1	2	—	4537N202	00000
						D	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	8:1	11/32"	8	3	Durometer 83D	Not Rated	1	2	—	4537N203	00000

Metric Ultra-Precision Lead Screws and Nuts


Style A	Style B	Style C

Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest. To ensure compatibility, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.

Lead Screw—Right-Hand Thread

303 Stainless Steel—303 stainless steel lead screws have good corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

	Lg., mm	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
303 Stainless Steel



	M2 × 0.5 mm	50	Metric Rounded Trapezoidal	1:1	1	0.5	±0.089 mm/300 mm	Brinell 160	90,000	7549K51	000000


	M2 × 0.5 mm	100	Metric Rounded Trapezoidal	1:1	1	0.5	±0.089 mm/300 mm	Brinell 160	90,000	7549K52	00000


	17-4 PH Stainless Steel



			M2 × 0.4 mm	145	Metric Rounded Trapezoidal	1:1	1	0.375	±0.15 mm/300 mm	Rockwell C35	145,000	90500A110	000000

Lead Screw with One Machinable End—Right-Hand Thread

Image of Product. Front orientation. Precision Lead Screws and Nuts. Metric Ultra-Precision Lead Screws and Nuts, Lead Screw with One Machinable End—Right-Hand Thread.

Lead screws with one machinable end let you create your own custom connection to suit your application.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	7	25	1:1	1	0.375	±0.15 mm/300 mm	Rockwell C35	145,000	90500A140	0000000

Lead Screw with One Coupling End—Right-Hand Thread

Image of Product. Front orientation. Precision Lead Screws and Nuts. Metric Ultra-Precision Lead Screws and Nuts, Lead Screw with One Coupling End—Right-Hand Thread.

Lead screws with one coupling end connect directly with your shaft without extra machining. Torque down the locknut once inserted.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	For Shaft Dia.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M2 × 0.4 mm	150	Metric Rounded Trapezoidal	6.5	15	2	1:1	1	0.375	±0.15 mm/300 mm	Rockwell C35	145,000	90500A170	0000000

Externally Threaded Nuts—Right-Hand Thread


Style A	Style B

Acetal—Acetal nuts have good wear and corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

												External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Dia.	Hex Wd.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
Acetal



		A	M2 × 0.5 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	1:1	1	0.5	3/8"-24	3/16"	Not Rated	8,000	10	-40 to 185	7549K58	000000


		PEEK



				B	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	1:1	1	0.375	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	90500A220	00000

Flange Nuts—Right-Hand Thread


Style C	Style C

Acetal—Acetal nuts have good wear and corrosion resistance.

Wear-Compensating Internal O-Ring—Flange nuts with wear-compensating internal O-ring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

					Flange
	Style	Thread Size	Lg.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes	Temp., ° F		Each
Acetal



		C	M2 × 0.5 mm	1/2"	0.297"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	39/64"	1	0.5	Not Rated	8,000	10	2	-40 to 185	7549K62	000000


		PEEK



				C	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	1:1	11/32"	1	0.375	Durometer 83D	Not Rated	2	2	—	90500A250	00000


				PEEK with Wear-Compensating Internal O-Ring



						C	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	1:1	11/32"	1	0.375	Durometer 83D	Not Rated	1	2	—	90500A280	000000

Coupling Nuts

Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.

Low-Strength Steel

Rated Grade 2 or lower, these are about half as strong as medium-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Black-Oxide Steel—A dark, matte coating creates a finished look. Nuts offer minimal corrosion resistance, so they're best for dry environments.

						Each
	Thread Size	Lg., mm	Wd., mm	Threading		1-9	10-49	50-Up
Zinc-Plated Steel



		M2 × 0.4 mm	6	4.5	Fully Threaded	93355A510	00000	00000	00000


		M2 × 0.4 mm	12	4.5	Fully Threaded	90264A801	0000	0000	0000


		Black-Oxide Steel



				M2 × 0.4 mm	6	4.5	Fully Threaded	93020A101	0000	0000	0000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to the harsh chemicals that 316 stainless steel can.

						Each
	Thread Size	Lg., mm	Wd., mm	Threading		1-9	10-49	50-Up
18-8 Stainless Steel



		M2 × 0.4 mm	6	4	Fully Threaded	93590A101	00000	00000	00000


		Black-Oxide 18-8 Stainless Steel



				M2 × 0.4 mm	6	4	Fully Threaded	93590A317	0000	0000	0000

Lightweight Aluminum

6061 Aluminum—One-third the weight of steel, these nuts are commonly used in robotics, automation, and other applications that have weight limitations. They're an alternative to stainless steel for rust resistance but are not as strong.

						Each
	Thread Size	Lg., mm	Wd., mm	Threading		1-9	10-49	50-Up
6061 Aluminum



		M2 × 0.4 mm	6	4.5	Fully Threaded	90012A210	00000	00000	00000

Brass

Brass—With a warm, polished look, these nuts are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. It is also softer than other metals, so it's easier to thread together.

						Each
	Thread Size	Lg., mm	Wd., mm	Threading		1-9	10-49	50-Up
Brass



		M2 × 0.4 mm	6	4	Fully Threaded	90465A411	000000	000000	000000

Plastic

Nylon 6/6—Slippery and abrasion resistant, these nuts thread on smoothly and stand up to daily wear and tear. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.

					Temp., ° F				Each
	Thread Size	Lg., mm	Wd., mm	Threading	Min.	Max.	Color		1-9	10-49	50-Up
Nylon 6/6



		M2 × 0.4 mm	6	4	Fully Threaded	-40	250	Off-White	1319N21	00000	00000	00000

Male Heat-Set Threaded Inserts for Plastic

Mount components directly to plastic parts. The male threaded rod on these inserts creates an attachment point. Heat them on a hot plate and press the knurled end into a straight hole. The heat melts the surrounding plastic and as it cools, it hardens around the knurls.

Brass—Conductive and nonmagnetic, these inserts are useful for electrical applications. They resist moisture but aren't as strong as steel inserts.

	Drill Bit Size, mm	For Max. Hole Dia., mm		Each
Standard Profile







	Brass

	M2 x 0.4 mm	9.525	4	3.2	3.1	96975A114	00000

Tapered Male Heat-Set Threaded Inserts for Plastic

Guide the tapered end of these inserts into a hole for quick alignment, and then mount components onto the male threaded end. To install, first drill a hole into your plastic workpiece and taper the top half. Then, heat the insert on a hot plate and press the knurled end into the hole.

Brass—Conductive and nonmagnetic, these inserts are useful for electrical applications. They resist moisture but aren't as strong as steel inserts.

	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia., mm	For Hole Taper Angle	Pkg. Qty.		Pkg.
Brass



	M2 x 0.4 mm	4.8	36 Ga.	2.7	8°	5	93518A180	000000