30mm Rods | McMaster-Carr

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into low-strength fasteners, pins, and axles. You can surface harden this material for added wear resistance.

If you don't see the size you're looking for, check out our Made-to-Order Low-Carbon Steel Rods.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Long Rods

Cold Worked—Cold-worked products have a finished look and quality. The cold-working process gives the steel consistent strength, hardness, and dimensions throughout.

Dia., mm	Dia. Tolerance, mm	Fabrication	Yield Strength, psi	Mechanical Finish	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1/2 ft. Long	1 ft. Long	2 ft. Long	3 ft. Long	4 ft. Long	6 ft. Long	8 ft. Long
30	-0.05 to 0	Cold Worked	54,000	—	Rockwell B70 (Medium)	Not Rated	ASTM A108	8920K44	000000	000000	000000	000000	0000000	0000000	0000000
30	-0.01 to 0	Cold Worked	50,000	Ground, Polished, Turned	Rockwell B70 (Medium)	Not Rated	ASTM A108	8920K304	—	00000	—	000000	—	000000	—

Linear Shafts

Pair with linear bearings and shaft supports to create smooth, precise motion. These linear shafts are turned, ground, and polished to tight tolerances and hardened to resist wear.

Steel—Stronger than aluminum and stainless steel. These shafts are best for dry environments since moisture will cause them to rust.

Highly Wear-Resistant 420 Stainless Steel—Balancing strength, wear resistance, and corrosion resistance, these shafts can handle moisture and mild cleaning solutions.

Surface Smoothness—The lower the microinch value, the smoother the finish and the less friction it will cause on the bearing.

	Hardness Rating	Surface Smoothness, μin		Each
Steel







	30 mm Diameter

	100	-0.02 to -0.007	Rockwell C60	Extra Hard	16	5033N191	000000


	200	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K114	00000
	300	-0.02 to -0.007	Rockwell C60	Extra Hard	16	5033N194	00000
	400	-0.02 to -0.007	Rockwell C60	Extra Hard	16	5033N195	00000
	500	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K74	00000
	750	-0.01 to 0	Rockwell C60	Extra Hard	8	6767N139	00000
	1,000	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K75	000000
	1,200	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K76	000000
	1,500	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K77	000000
	2,000	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K23	000000
	2,500	-0.013 to 0	Rockwell C59	Extra Hard	12	6112K33	000000


	Highly Wear-Resistant 420 Stainless Steel







					30 mm Diameter

					500	-0.013 to 0	Rockwell C52	Extra Hard	12	6459K81	000000


					600	-0.013 to 0	Rockwell C52	Extra Hard	12	6459K82	000000
					800	-0.013 to 0	Rockwell C52	Extra Hard	12	6459K83	000000
					1,000	-0.013 to 0	Rockwell C52	Extra Hard	12	6459K84	000000
					1,200	-0.013 to 0	Rockwell C52	Extra Hard	12	6459K85	000000
					1,500	-0.013 to 0	Rockwell C52	Extra Hard	12	6459K86	000000

Multipurpose 304 Stainless Steel Rods

Made from the most common stainless steel, these 304 stainless steel rods are used to create corrosion-resistant parts for a wide range of applications. Machine them into anything from shafts on chemical mixers to flanges on beverage lines. They maintain their corrosion resistance in temperatures up to 1500° F.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Long Rods

Image of Product. Front orientation. Stainless Steel. Multipurpose 304 Stainless Steel Rods.

Dia. Tolerance, mm	Material	Fabrication	Hardness		1 ft. Long	1 1/2 ft. Long	3 ft. Long



30	-0.084 to 0	304 Stainless Steel	Cold Worked	Rockwell B80 (Medium)	1272T59	0000000	0000000	0000000

Multipurpose 6061 Aluminum Rods

The most widely used aluminum, 6061 is made into everything from pipe fittings to containers to airplane parts. It balances strength and corrosion resistance, plus it's easy to machine and weld.

Don't see the size you need? Check out our Made-to-Order 6061 Aluminum Rods.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Long Rods

Image of Product. Front orientation. Aluminum. Multipurpose 6061 Aluminum Rods.

Dia. Tolerance, mm	Fabrication	Temper Designation	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long



30	-0.310 to 0.310	Extruded	T6	ASTM B221	4634T44	000000	000000	0000000

Tight-Tolerance Multipurpose 4140 Alloy Steel Rods

Ready for turning in your lathe, these rods are precision ground and held to a strict straightness tolerance. Also known as chrome-moly steel, this versatile alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress. For added wear resistance, you can surface harden these rods with heat treating.

Note: Rods may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Heat Treatment	Yield Strength, psi	Mechanical Finish	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1/2 ft. Long	1 ft. Long	2 ft. Long	3 ft. Long	4 ft. Long	6 ft. Long	8 ft. Long	12 ft. Long
30	-0.013 to 0	Cold Drawn	Annealed	60,000	Precision Ground	Rockwell B90 (Medium)	Rockwell C60	ASTM A108	5836T44	000000	000000	000000	0000000	0000000	0000000	0000000	0000000

Tight-Tolerance Extreme-Strength 17-4 PH Stainless Steel Rods

Machine high-strength parts that require pinpoint precision. Ready to turn in your lathe, these rods come precision ground to tight diameter tolerances.

17-4 PH stainless steel combines the strength of 400 series stainless steel with the corrosion resistance of 300 series. This makes it fit for the most demanding applications—even storing and protecting nuclear waste. You can be confident it will stay corrosion resistant in temperatures as hot as 1100° F. Also known as 630 stainless steel.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia. Tolerance, mm	Max. Temp., ° F	Fabrication	Hardness	Max. Hardness After Heat Treatment	Heat Treatment	Specs. Met		1/2 ft. Long	1 ft. Long	2 ft. Long	3 ft. Long	6 ft. Long



30	-0.013 to 0	1,100	Cold Worked	Rockwell C28 (Hard)	Rockwell C47	Annealed	ASTM A564	3180T24	000000	0000000	0000000	0000000	0000000

Tight-Tolerance Multipurpose Low-Carbon Steel Rods

These rods are precision ground and held to a strict straightness tolerance, so they're ready for turning in a lathe. Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into low-strength fasteners, pins, and axles. For added wear resistance, this material can be surface hardened with heat treating.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Yield Strength	Hardness	Mechanical Finish	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.013 to 0	Cold Drawn	Not Rated	Not Rated	Precision Ground	ASTM A108	6103N33	000000	000000	0000000

Multipurpose Flame-Retardant Garolite G-10/FR4 Rods

Made of a flame-retardant epoxy resin with fiberglass fabric reinforcement, these G-10/FR4 rods are a good all-around choice. They are strong, machinable, and electrically insulating. Garolite G-10/FR4 is also called epoxy-grade industrial laminate and phenolic.

If you don’t see the size you’re looking for, please specify a length under additional rod lengths.

Rod

Image of Product. Front orientation. Garolite. Multipurpose Flame-Retardant Garolite G-10/FR4 Rods.

	Dia. Tolerance, mm	Temp. Range, ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Mil. Spec.	Flammability Rating		1 ft. Long	4 ft. Long
Green



	30	-0.026 to 0.026	-100 to 245	35,000 to 50,000	5.5 to 12	Rockwell M115 (Extra Hard)	Yes	MIL-I-24768/27	UL 94 V-0	8669K644	000000	0000000

Tapped Linear Shafts

Mount directly with studs, bolts, and other threaded fasteners—no shaft supports needed. Pair with linear bearings to create smooth, precise motion. These shafts are turned, ground, and polished to tight tolerances and hardened to resist wear.

Tapped on One End

Steel—Stronger than aluminum and stainless steel. These shafts are best for dry environments since moisture will cause them to rust.

Surface Smoothness—The lower the microinch value, the smoother the finish and the less friction it will cause on the bearing.

			Thread
	Lg., mm	Dia. Tolerance, mm	Thread Size	Lg.	Hardness	Hardness Rating	Surface Smoothness, μin		Each
Steel







				30 mm Diameter

				400	-0.02 to -0.007	M16 × 2 mm	32 mm	Rockwell C60	Extra Hard	16	5562N184	0000000


				1,200	-0.02 to -0.007	M16 × 2 mm	32 mm	Rockwell C60	Extra Hard	16	5562N189	000000

Extreme-Strength Highly Machinable 1144 Carbon Steel Rods

Made with more carbon and manganese than other easy-to-machine carbon steels, 1144 carbon steel has a higher yield strength and hardness. Use them to fabricate parts that require stress resistance, such as gears, shafts, and bushings. For added wear resistance, these rods can be surface hardened with heat treating.

100,000 psi Yield Strength—Also known as Stressproof, these rods are stress-relieved to minimize warping during machining.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Heat Treatment	Yield Strength, psi	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.013 to 0	Cold Drawn	Stress Relieved	100,000	Rockwell C19 (Medium)	Not Rated	ASTM A108, ASTM A311	3445N183	000000	0000000	0000000

Highly Machinable 4140 Alloy Steel Rods

Often called ETD-150, this modified alloy steel is drawn at high temperatures for excellent strength and machinability. Also known as chrome-moly steel, 4140 alloy steel resists fracturing from repeated stress. It is used for a wide range of parts, such as gears, axles, and shafts. These rods have been hardened for added resistance to abrasion and impact.

Note: Rods may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Heat Treatment	Yield Strength, psi	Hardness	Specs. Met		1 ft. Long	2 ft. Long	3 ft. Long	6 ft. Long
30	-0.025 to 0	Cold Worked	Hardened	130,000	Rockwell C32 (Hard)	ASTM A108	6818T48	0000000	0000000	0000000	0000000

Tight-Tolerance Multipurpose 6061 Aluminum Rods

Ground to paper-thin tolerances, these 6061 aluminum rods are best for precision parts.

6061 is the most widely used aluminum, made into everything from pipe fittings to containers to airplane parts. It balances strength and corrosion resistance, plus it’s easy to machine and weld.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Long Rods

Image of Product. Front orientation. Aluminum. Tight-Tolerance Multipurpose 6061 Aluminum Rods.

Held to a strict straightness tolerance, these rods are all set for turning in your lathe.

Dia., mm	Dia. Tolerance, mm	Fabrication	Temper Designation	Specs. Met	Straightness Tolerance		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.013 to 0.013	Extruded	T6511	ASTM B221	0.021"/1 ft.	6940T24	000000	0000000	0000000

Flange-Mount Idler Rotary Shafts

Mount the flange to a machine or wall to support idler sprockets and pulleys in tensioning applications. They include washers and a nut to position your component and hold it in place.

			Overall, mm		Thread				Mounting Holes
	Dia., mm	Lg., mm	Lg.	Dia.	Size	Lg., mm	Flange Thk., mm	Bolt Circle Dia., mm	No. of	Dia., mm	Edge Type	Hardness Rating	Hardness		Each
Threaded End—Zinc-Plated 1215 Carbon Steel



		10	11	28	30	M8 × 1.25 mm	8.26	7	22	4	3	Straight	Medium	Rockwell B84	2435K32	000000

Rotary Shafts

Pair with gears, sprockets, and bearings to transmit rotary motion. Turned, ground, and polished to tight tolerances, these shafts reduce vibration, evenly distribute loads, and improve accuracy.

Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.

Corrosion-Resistant 303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These shafts are easier to machine than other stainless steel shafts.

				Material
	Lg., mm	Straightness Tolerance	Diameter Tolerance	Hardness	Hardness Rating		Each
Carbon Steel







				30 mm Diameter

				200	0.3 mm/300 mm	-0.102 mm to 0 mm	Rockwell C25	Hard	1482K49	000000


				400	0.3 mm/300 mm	-0.102 mm to 0 mm	Rockwell C25	Hard	1482K51	00000
				500	0.3 mm/300 mm	-0.102 mm to 0 mm	Rockwell C25	Hard	1482K52	00000
				1,000	0.3 mm/300 mm	-0.102 mm to 0 mm	Rockwell C25	Hard	1482K53	00000
				1,200	0.3 mm/300 mm	-0.102 mm to 0 mm	Rockwell C25	Hard	1482K54	00000
				1,500	0.3 mm/300 mm	-0.102 mm to 0 mm	Rockwell C25	Hard	1482K55	000000


				Corrosion-Resistant 303 Stainless Steel







								30 mm Diameter

								100	0.18 mm/300 mm	-0.01 mm to 0 mm	Rockwell B83	Medium	4143N57	00000


								200	0.18 mm/300 mm	-0.01 mm to 0 mm	Rockwell B83	Medium	4143N58	000000
								400	0.18 mm/300 mm	-0.01 mm to 0 mm	Rockwell B83	Medium	4143N59	000000
								600	0.18 mm/300 mm	-0.01 mm to 0 mm	Rockwell B83	Medium	4143N61	000000
								800	0.18 mm/300 mm	-0.01 mm to 0 mm	Rockwell B83	Medium	4143N62	000000
								1,000	0.18 mm/300 mm	-0.01 mm to 0 mm	Rockwell B83	Medium	4143N63	000000

Tight-Tolerance Ultra-Machinable 12L14 Carbon Steel Rods

Ready for turning in a lathe, these rods are precision ground and held to a strict straightness tolerance. The lead additive acts as a lubricant, which allows 12L14 carbon steel to withstand very fast machining. It's used to fabricate a wide variety of machine parts, such as shaft couplings, studs, and pins. For added wear resistance, they can be surface hardened with heat treating.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Yield Strength, psi	Mechanical Finish	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1 ft. Long	2 ft. Long	3 ft. Long	6 ft. Long
30	-0.012 to 0	Cold Worked	65,000	Precision Ground	Rockwell B80 (Medium)	Rockwell C65	ASTM A108	5544T32	000000	000000	0000000	0000000

Tight-Tolerance Hardened Extreme-Strength 17-4 PH Stainless Steel Rods

For ultimate precision, strength, and wear resistance, choose these 17-4 PH stainless steel rods. They come hardened, so they're less likely to dent and deform. Precision ground to tight diameter tolerances, they're all set to turn in your lathe.

17-4 PH combines the strength of 400 series stainless steel with the corrosion resistance of 300 series. This makes it fit for the most demanding applications—even storing and protecting nuclear waste. You can be confident it will stay corrosion resistant in temperatures as hot as 1100° F. Also known as 630 stainless steel.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia. Tolerance, mm	Max. Temp., ° F	Fabrication	Hardness	Heat Treatment	Heat Treatment Condition Code	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long



30	-0.013 to 0	1,100	Cold Drawn, Hot Rolled	Rockwell C42 (Hard)	Hardened	H900	ASTM A564, SAE AMS5643	1141T57	0000000	0000000	0000000

Tight-Tolerance Extra-High-Strength 7075 Aluminum Rods

When precision and yield strength are nonnegotiable, choose these 7075 aluminum rods. They’re ground to paper-thin tolerances for parts that require pinpoint precision. Held to a strict straightness tolerance, they’re all set to turn in your lathe.

7075 is one the strongest aluminum alloys, boasting a yield strength that rivals carbon steel rebar. Originally made for aircraft frames, it’s now turned into gears, machine keys, and other high-stress parts. It’s a good substitute for 2024 aluminum when forming and welding aren’t top concerns.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Temper Designation	Specs. Met	Straightness Tolerance		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.0127 to 0	Cold Worked	T6	ASTM B211	0.005"/1 ft.	9403T61	0000000	0000000	0000000

Multipurpose 4140 Alloy Steel Rods

Also known as chrome-moly steel, this versatile alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress. For added wear resistance, the surface can be hardened with heat treating.

If you don't see the size you're looking for, check out our Made-to-Order 4140 Alloy Steel Rods.

Note: Rods may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Long Rods

Cold Worked—Cold-worked steel products have a smooth, polished finish. They also have consistent mechanical properties and highly accurate dimensions.

Dia., mm	Dia. Tolerance, mm	Fabrication	Heat Treatment	Yield Strength, psi	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.051 to 0	Cold Worked	Annealed	60,000	Rockwell C10 (Medium)	Not Rated	ASTM A108	8927K92	000000	0000000	0000000

Hollow Linear Shafts

Substantially lighter in weight than standard shafts, these are best for light loads. You can also run wiring, pneumatic tubing, coolants, and lubricants through the shaft's hollow center. Pair with linear bearings and shaft supports to create smooth, precise motion. These linear shafts are turned, ground, and polished to tight tolerances and hardened to resist wear.

Steel—Stronger than aluminum and stainless steel. These shafts are best for dry environments since moisture will cause them to rust.

Surface Smoothness—The lower the microinch value, the smoother the finish and the less friction it will cause on the bearing.

	Hardness	Hardness Rating	Surface Smoothness, μin		Each
Steel







	30 mm Diameter

	300	-0.021 to 0	18.2	Rockwell C59	Extra Hard	12	5964K23	000000


	500	-0.021 to 0	18.2	Rockwell C59	Extra Hard	12	5964K43	000000
	1,000	-0.021 to 0	18.2	Rockwell C59	Extra Hard	12	5964K53	000000
	1,500	-0.021 to 0	18.2	Rockwell C59	Extra Hard	12	5964K73	000000

Fast-Travel Ball Screws and Nuts


	Ball Nuts, Externally Threaded Nut, Style A

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 A.

Style A

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



	A	M12	50	30	1	10	M25	Rockwell C56	1,000	0.02	32 to 150	4566N301	0000000

Lead-Free Ultra-Machinable 1215 Carbon Steel Rods

A lead-free alternative to 12L14, 1215 carbon steel contains the same amount of sulfur and phosphorus for excellent machinability. It’s often used for shaft couplings, studs, and pins. For added wear resistance, you can harden its surface with heat treating.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Yield Strength, psi	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.013 to 0	Cold Worked	60,000	Rockwell B85 (Medium)	Not Rated	ASTM A108	2955N18	0000000	0000000	0000000

Tight-Tolerance Oil-Hardening O1 Tool Steel Rods

Ready for turning in a lathe, these rods are precision ground to a tight diameter tolerance. They’re also known as drill rod. Often used for dies, punches, and gauges, O1 tool steel is an oil-hardening material that resists wear and abrasion. It can also be surface hardened with heat treating for added wear resistance.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia., mm	Dia. Tolerance, mm	Fabrication	Heat Treatment	Yield Strength, psi	Mechanical Finish	Hardness	Max. Hardness After Heat Treatment	Specs. Met		1 ft. Long	3 ft. Long	6 ft. Long
30	-0.0250 to 0.0250	Hot Rolled	Annealed	50,000	Precision Ground	Rockwell B90 (Medium)	Rockwell C65	ASTM A681	8893K295	000000	000000	0000000

Support-Rail Shafts

Attached support rails prevent bending or bearing misalignment under moderate to heavy loads. Pair with linear bearings to create smooth, precise motion. These linear shafts are turned, ground, and polished to tight tolerances and hardened to resist wear.

Steel—Stronger than aluminum and stainless steel. These shafts are best for dry environments since moisture will cause them to rust.

Surface Smoothness—The lower the microinch value, the smoother the finish and the less friction it will cause on the bearing.

	Overall Wd., mm	Mounting Hole Dia., mm	Hardness	Hardness Rating	Surface Smoothness, μin	Support Rail Material		Each
Steel







	30 mm Diameter

	1,200	-0.013 to 0	53	74	9	Rockwell C60	Extra Hard	12	6063 Aluminum	59585K16	0000000