M18 Threaded 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-Yellow-Chromate-Plated Steel and 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-Yellow-Chromate-Plated Steel







	M18 × 2.5 mm

	1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	98942A121	000000


	Zinc-Plated Steel







					M18 × 2.5 mm

					1 m	110,000	Class 8.8	Rockwell C20	DIN 975	99067A263	00000


					Steel







									M18 × 1.5 mm

									150 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	95245A240	00000


									300 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	95245A122	000000
									1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 975	95245A204	000000




											M18 × 2.5 mm

											50 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A438	0000


											100 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A439	00000
											150 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93675A513	00000
											300 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A350	00000
											500 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93675A514	00000
											1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A230	00000
											1 m	110,000	Class 8.8	Rockwell C20	DIN 976	99055A143	00000
											2 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A130	00000

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







	M18 × 2.5 mm

	50 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N64	000000


	100 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N65	00000
	150 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N66	00000
	200 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N67	00000
	300 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N68	00000
	500 mm	150,000	Class 10.9	Rockwell C32	DIN 976	1078N69	00000
	1 m	150,000	Class 10.9	Rockwell C32	DIN 976	1078N17	00000

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







	M18 × 2.5 mm

	300 mm	50,000	Rockwell B49	DIN 976	1	94595A227	000000


	1 m	50,000	Rockwell B49	DIN 976	1	94595A228	00000


	Steel







					M18 × 1.5 mm

					150 mm	50,000	Rockwell B49	DIN 976	1	98861A608	00000


					300 mm	50,000	Rockwell B49	DIN 976	1	98861A560	00000
					1 m	50,000	Rockwell B49	DIN 975	1	98861A344	00000




							M18 × 2.5 mm

							300 mm	50,000	Rockwell B49	DIN 976	1	98861A210	00000


							1 m	50,000	Rockwell B49	—	1	90435A212	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.

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







	M18 × 2.5 mm

	50 mm	70,000	Not Rated	DIN 976	1	93805A651	000000


	100 mm	70,000	Not Rated	DIN 976	1	93805A652	00000
	150 mm	70,000	Not Rated	DIN 976	1	90024A430	00000
	500 mm	70,000	Not Rated	DIN 976	1	90024A440	00000
	1 m	70,000	Not Rated	DIN 976	1	90024A130	00000

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



		20	15	46	50	M18 × 2.5 mm	16.56	11	36	4	6	Straight	Medium	Rockwell B84	2435K34	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	Specs. Met		1-9	10-49	50-Up
Zinc-Plated Steel



		M18 × 2.5 mm	54	27	Fully Threaded	DIN 6334	93355A550	000000	000000	000000


		Black-Oxide Steel



				M18 × 2.5 mm	54	27	Fully Threaded	DIN 6334	93020A107	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.

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

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



		M18 × 2.5 mm	54	27	Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	Material Certificate	90009A233	000000	000000	000000


		Black-Oxide Steel



				M18 × 2.5 mm	54	27	Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	Material Certificate	90082A119	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.

Highly Corrosion-Resistant 316 Stainless Steel—The most corrosion-resistant stainless steel coupling nuts we offer, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals.

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



		M18 × 2.5 mm	54	27	Fully Threaded	ASME B18.2.2, DIN 6334	—	93590A312	000000	000000	000000


		Highly Corrosion-Resistant 316 Stainless Steel



				M18 × 2.5 mm	54	27	Fully Threaded	DIN 6334	Material Certificate	90111A337	00000	00000	00000

Extreme-Pressure Iron and Steel Threaded Pipe Fittings

The strongest steel fittings we offer, these can withstand extreme-pressure applications.

Note: The maximum pressure listed for Class 6000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.

Straight Connectors

Female, Threaded

Fitting Connection

Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.

	Body Shape	Material	Max. Pressure @ Temp.		Each
Metric Female



	M18 × 1.5 mm	Hex	Zinc-Plated Steel	4,000 psi @ 72° F	4936K984	000000

Straight Adapters

Female x Male

Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.

	Pipe Size (B)	Dash Size (B)	Body Shape	Material	Max. Pressure @ Temp.		Each
Metric Female × NPT Male



	M18 × 1.5 mm	3/8	06	Hex	Zinc-Plated Steel	5,500 psi @ 72° F	4936K865	000000


	M18 × 1.5 mm	1/2	08	Hex	Zinc-Plated Steel	4,500 psi @ 72° F	4936K866	00000

Straight Adapters with Gasket


Female x Male	Male x Male

Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.

	Thread Size (B)	Dash Size (A)	Body Shape	Material	Max. Pressure @ Temp.	Gasket Material		Each
NPT Female × Metric Male



	3/8	M18 × 1.5 mm	06	Hex	Zinc-Plated Steel	4,000 psi @ 72° F	Buna-N	4936K157	00000


	1/2	M18 × 1.5 mm	08	Hex	Zinc-Plated Steel	3,500 psi @ 72° F	Buna-N	4936K159	0000


	NPT Male × Metric Male



			3/8	M18 × 1.5 mm	06	Hex	Zinc-Plated Steel	5,500 psi @ 72° F	Buna-N	4936K768	00000


			BSPP Male × Metric Male



					1/2	M18 × 1.5 mm	08	Hex	Zinc-Plated Steel	4,500 psi @ 72° F	Buna-N	4936K755	00000

Replacement Washers

	For Thread Size	ID, mm	OD, mm	Thk., mm		Each
For BSPP Male



	1/2	—	18.64	28.58	2.5	4936K634	00000


	For Metric Male



			—	M18	14.76	26	1.5	4936K652	0000

Ball Joint Rod Ends with Grease Fitting

Connect your grease gun to the fitting to lubricate. Made of steel, these rod ends generally handle higher loads than stainless steel, aluminum, and nylon rod ends.

	Shank
	Thread Size	Ctr. Lg., mm	Thread Lg., mm	ID, mm	Max. Ball Swivel	Overall Wd., mm	Overall Thk., mm	Static Radial Load Cap., lb.	Material	Choose a Shank Thread Direction		Each
Ball Joints with Grease Fitting



		M18 × 1.5 mm	72	44	18	30°	42	23	10,750	Carbon Steel	Right Hand, Left Hand	4444T18	000000

Corrosion-Resistant Ball Joint Rod Ends

Made of stainless steel, these rod ends provide excellent corrosion resistance. A PTFE liner allows smooth ball rotation and eliminates the need for lubrication.

	Shank
	Thread Size	Ctr. Lg., mm	Thread Lg., mm	ID, mm	Max. Ball Swivel	Overall Wd., mm	Overall Thk., mm	Static Radial Load Cap., lb.	Material	Choose a Shank Thread Direction		Each
Ball Joints



		M18 × 1.5 mm	72	44	18	30°	42	23	6,400	303 Stainless Steel	Right Hand, Left Hand	2988K18	000000

Internally Threaded Chemical-Resistant Ball Joint Rod Ends

Made of impact-resistant nylon, these rod ends withstand corrosion as well as fuels, lyes, and weak acids. They are also 80% lighter than steel rod ends. A self-lubricating nylon ball provides maximum abrasion resistance and eliminates the need for lubrication.

	Shank
	Thread Size	Ctr. Lg., mm	Thread Lg., mm	ID, mm	Max. Ball Swivel	Overall Wd., mm	Overall Thk., mm	Static Radial Load Cap., lb.	Temp. Range, ° F	Specs. Met	Material	Shank Thread Direction		Each
Ball Joints



		M18 × 1.5 mm	71	32	18	11.5°	46	16	510	-20 to 175	ISO 12240-4	Nylon	Right Hand	1064K931	000000

Extreme-Pressure Stainless Steel Threaded Pipe Fittings

With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.

Straight Adapters with Gasket


Female x Male	Male x Male

UN/UNF (SAE Straight) Thread—Also known as O-ring boss threads.

316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.

		Thread Size		Dash Size				316 Stainless Steel
	Pipe Size (A)	(A)	(B)	(A)	(B)	Body Shape	Gasket Material	Max. Pressure @ Temp.		Each
NPT Female × Metric Male



		3/8	—	M18 × 1.5 mm	06	—	Hex	Buna-N	4,500 psi @ 72° F	4822T396	000000


		1/2	—	M18 × 1.5 mm	08	—	Hex	Buna-N	4,000 psi @ 72° F	4822T397	00000


		BSPP Male × Metric Male



				1/2	—	M18 × 1.5 mm	08	—	Hex	Buna-N	4,500 psi @ 72° F	4822T175	00000


				UN/UNF (SAE Straight) Female × Metric Male



						—	3/4"-16	M18 × 1.5 mm	08	—	Hex	Buna-N	3,500 psi @ 72° F	51205K785	000000


						Metric Female × UN/UNF (SAE Straight) Male



								—	M18 × 1.5 mm	3/4"-16	—	08	Hex	Buna-N	6,000 psi @ 72° F	51205K766	00000

Replacement Washers

	For Thread Size	ID, mm	OD, mm	Thk., mm		Each
For BSPP Male



	1/2	—	18.64	28.58	2.5	4822T404	00000


	For Metric Male



			—	M18	14.76	26	1.5	4822T418	00000