M30 Rods | McMaster-Carr

With tensile strengths from 110,000 psi to 125,000 psi, these rods are strong enough for most industrial applications, such as anchoring machinery and connecting pipe flanges. They are about twice as strong as low-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also medium-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.

	Hardness	Specs. Met		Each
Zinc-Plated Steel







	M30 × 3.5 mm

	1 m	110,000	Class 8.8	Rockwell C20	DIN 975	99067A278	0000000


	Steel







					M30 × 1.5 mm

					1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	95245A159	000000




							M30 × 2 mm

							300 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 975	95245A183	000000


							1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 975	95245A184	000000




									M30 × 3.5 mm

									300 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A325	00000


									300 mm	110,000	Class 8.8	Rockwell C20	DIN 976	99055A251	00000
									500 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93675A515	000000
									500 mm	110,000	Class 8.8	Rockwell C20	DIN 976	99055A359	000000
									1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A300	000000
									1 m	110,000	Class 8.8	Rockwell C20	DIN 975	99055A160	000000
									2 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A315	000000

High-Strength Steel

With a tensile strength of 150,000 psi, these rods are strong enough to stabilize steel frameworks and structural supports, such as I-beams. They are about 25% stronger than medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also high-strength steel.

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

	Hardness	Specs. Met		Each
Steel







	M30 × 3.5 mm

	100 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N93	000000


	150 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N94	00000
	200 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N95	00000
	300 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N96	00000
	500 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N97	000000
	1 m	150,000	Class 10.9	Rockwell C32	DIN 976	1078N23	000000
	2 m	150,000	Class 10.9	Rockwell C32	DIN 976	1078N98	000000

Extreme-Strength Steel

Our strongest threaded rods have a tensile strength of 170,000 psi to hold up in your most demanding high-stress applications. They're about 20% stronger than high-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also extreme-strength steel.

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

	Hardness	Specs. Met		Each
Steel







	M30 × 3.5 mm

	100 mm	170,000	Class 12.9	Rockwell C39	DIN 976	1077N598	000000


	150 mm	170,000	Class 12.9	Rockwell C39	DIN 976	1077N612	00000
	200 mm	170,000	Class 12.9	Rockwell C39	DIN 976	1077N623	00000
	300 mm	170,000	Class 12.9	Rockwell C39	DIN 976	1077N633	000000
	500 mm	170,000	Class 12.9	Rockwell C39	DIN 976	1077N646	000000
	1 m	170,000	Class 12.9	Rockwell C39	DIN 976	1077N18	000000
	2 m	170,000	Class 12.9	Rockwell C39	DIN 976	1077N661	000000

Low-Strength Steel

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







	M30 × 3.5 mm

	300 mm	50,000	Rockwell B49	DIN 976	1	94595A249	000000


	1 m	50,000	Rockwell B49	DIN 976	1	93000A624	00000


	Steel







					M30 × 1.5 mm

					1 m	50,000	Rockwell B49	DIN 976	1	98861A576	000000




							M30 × 2 mm

							300 mm	50,000	Rockwell B49	DIN 976	1	98861A616	00000


							1 m	50,000	Rockwell B49	DIN 976	1	98861A577	000000




									M30 × 3.5 mm

									300 mm	50,000	Rockwell B49	DIN 976	1	98861A230	00000


									1 m	50,000	Rockwell B49	DIN 976	1	98861A170	00000

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.

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







	M30 × 3.5 mm

	300 mm	70,000	—	Not Rated	DIN 976	1	90024A314	000000


	500 mm	70,000	—	Not Rated	DIN 976	1	90024A490	000000
	1 m	70,000	—	Not Rated	DIN 976	1	90024A315	000000
	2 m	70,000	—	Not Rated	DIN 976	1	90024A316	000000


	Highly Corrosion-Resistant 316 Stainless Steel







					M30 × 3.5 mm

					300 mm	70,000	—	Not Rated	DIN 976	1	94185A593	000000


					1 m	75,000	ASTM Grade B8M	Not Rated	ASTM A193, DIN 976	1	94185A594	000000
					2 m	75,000	—	Not Rated	DIN 976	1	94185A595	000000

Fast-Travel Ball Screws and Nuts


	Ball Nuts, Externally Threaded Nut, Style B

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. To ensure compatibility, select components that have the same thread size and number of thread starts. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Externally Threaded Ball Nuts—Right-Hand Threaded

Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Fast-Travel Ball Screws and Nuts, Ball Nuts, Externally Threaded Nut, Style B.

Style B

Carbon Steel—Carbon steel ball screws and nuts are case hardened, so they resist wear better than standard carbon steel. However, they are less corrosion resistant than black-oxide alloy steel screws and nuts.

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

	Thread Size	Lg., mm	Dia., mm	No. of Thread Starts	Travel Distance per Turn, mm	External Thread Size	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Carbon Steel



	B	M16	50	39	4	16	M30	Rockwell C56	1,500	0.04	32 to 150	4566N302	0000000

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	Specs. Met		1-9	10-49	50-Up
Zinc-Plated Steel



		M30 × 3.5 mm	90	46	Fully Threaded	DIN 6334	93355A580	0000000	000000	000000


		Black-Oxide Steel



				M30 × 3.5 mm	90	46	Fully Threaded	DIN 6334	93020A111	00000	00000	00000

Medium-Strength Steel

These Grade 5 or Class 8 nuts are about twice as strong as low-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	Fastener Strength Grade/Class	Threading	Specs. Met		1-9	10-49	50-Up
Zinc-Plated Steel



		M30 × 3.5 mm	90	46	Class 8	Fully Threaded	DIN 6334	90009A228	000000	000000	000000


		Black-Oxide Steel



				M30 × 3.5 mm	90	46	Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	90082A125	00000	00000	00000

High-Strength Steel

Rated Grade 8 or Class 10, these are about 25% stronger than 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.

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

								Each
	Thread Size	Lg., mm	Wd., mm	Fastener Strength Grade/Class	Threading	Specs. Met		1-9	10-49	50-Up
Zinc-Plated Steel



		M30 × 3.5 mm	90	46	Class 10	Fully Threaded	DIN 6334	90331A555	0000000	000000	000000


		Steel



				M30 × 3.5 mm	90	46	Class 10	Fully Threaded	DIN 6334	97778A170	00000	00000	00000

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.

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



		M30 × 3.5 mm	90	46	Fully Threaded	ASME B18.2.2, DIN 6334	93590A316	000000	000000	000000

Threaded on Both Ends Setup Studs

Known as setup studs, these studs withstand sideways forces better than fully threaded studs because they have a strong unthreaded middle. The unthreaded middle also makes more contact with unthreaded holes, creating better alignment than a fully threaded stud.

Steel

	Thread, mm
	Lg. (A)	Lg. (B)	Lg., mm	Tensile Strength, psi		Each
M30 × 3.5 mm



		43	200	315	125,000	98867A114	000000

Black-Oxide Steel

Black-oxide steel studs resist rusting in dry environments.

DIN 6379—Studs that meet DIN standards meet dimensional and material requirements.

	Thread, mm
	Lg. (A)	Lg. (B)	Lg., mm	Tensile Strength, psi	Specs. Met		Each
M30 × 3.5 mm



		56	43	125	100,000	DIN 6379	93275A911	000000