M24 Couplings | McMaster-Carr

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Coupling Nut Profile

24 Products

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



		M24 × 3 mm	72	36	Fully Threaded	DIN 6334	93355A410	000000	000000	000000


		Black-Oxide Steel



				M24 × 3 mm	64	38	Fully Threaded	—	93020A791	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



		M24 × 3 mm	72	36	Class 8	Fully Threaded	DIN 6334	90009A227	000000	000000	000000


		Black-Oxide Steel



				M24 × 3 mm	72	36	Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	90082A123	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



		M24 × 3 mm	72	36	Class 10	Fully Threaded	DIN 6334	90331A558	000000	000000	000000


		Steel



				M24 × 3 mm	72	36	Class 10	Fully Threaded	DIN 6334	97778A160	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	Min. Thread Lg., mm	Specs. Met		1-9	10-49	50-Up
18-8 Stainless Steel



		M24 × 3 mm	72	36	Fully Threaded	—	ASME B18.2.2, DIN 6334	93590A314	000000	000000	000000


		M24 × 3 mm	144	41	Partially Threaded	24	—	90268A466	000000	000000	000000


		Highly Corrosion-Resistant 316 Stainless Steel



				M24 × 3 mm	72	36	Fully Threaded	—	DIN 6334	90111A340	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.

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	Threading		1-9	10-49	50-Up
Brass



		M24 × 3 mm	72	36	Fully Threaded	90465A425	000000	000000	000000

Metric Precision Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. 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 direction, size, and number of thread starts.

Round Nuts—Right-Hand Thread

932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair 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.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	Specs. Met		Each
932 Bearing Bronze



	M24 × 5 mm	2"	1.75"	Metric Trapezoidal	1:1	1	5	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	4,500	DIN 103	7549K38	000000

Externally Threaded Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Metric Precision Lead Screws and Nuts, Externally Threaded Nuts—Right-Hand Thread.

Manganese Bronze—Manganese bronze nuts have good strength and wear 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
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Specs. Met		Each
Manganese Bronze



		M24 × 5 mm	1 1/2"	1.5"	Metric Trapezoidal	1:1	1	5	1 3/8"-16	1/2"	Metric Trapezoidal Class 7H	Brinell 126	75,000	4,500	DIN 103	7549K93	0000000

Flange Nuts—Right-Hand Thread

Manganese Bronze—Manganese bronze nuts have good strength and wear 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.

				Flange
	Thread Size	Lg.	Dia.	Dia.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes	Specs. Met		Each
Manganese Bronze



		M24 × 5 mm	1 1/2"	1.5"	2 3/4"	33/64"	Metric Trapezoidal	1:1	2 17/64"	1	5	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	4,500	4	DIN 103	7549K23	000000

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 Adapters with Gasket

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
BSPP Male × Metric Male



	3/4	M24 × 1.5 mm	12	Hex	Zinc-Plated Steel	3,500 psi @ 72° F	Buna-N	4936K761	000000

Hex-Drive Plugs with Gasket

Threaded

Fitting

Connection,

Male

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

	Material	Max. Pressure @ Temp.	Gasket Material		Each
Metric Male



	M24 × 1.5 mm	Zinc-Plated Steel	5,600 psi @ 72° F	Buna-N	4936K933	000000

External-Hex-Drive Plugs with Gasket

Male

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

	Construction	Body Shape	Material	Max. Pressure @ Temp.	Gasket Material		Each
Metric Male



	M24 × 1.5 mm	Solid	Hex	Zinc-Plated Steel	5,600 psi @ 72° F	Buna-N	4936K896	000000

Replacement Washers

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



	3/4	—	24.13	34.93	2.5	4936K636	00000


	For Metric Male



			—	M24	20.11	32	2	4936K655	0000

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

Hex-Drive Plugs with Copper Washer

Male

Plugs with copper washer form a tight seal to prevent leaks. Also known as a crush washer, the washer compresses and deforms to fill gaps when tightened. Because it loses its shape when compressed, it’s not reusable. Made of copper, the washer resists rust. These plugs meet either DIN 908 or DIN 910, international standards for pipe plug dimensions.

	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
Metric Male



	M24 × 1.5 mm	Steel	Not Rated	Not Rated	97313A116	00000

External-Hex-Drive Plugs with Copper Washer

Male

	Construction	Body Shape	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
Metric Male



	M24 × 1.5 mm	Solid	Hex	Steel	Not Rated	Not Rated	97313A142	00000

Fully Threaded Rod End Bolts

For maximum mounting flexibility, cut the fully threaded shaft to whatever length you need. Also known as swing bolts and eyebolts, rod end bolts have no moving parts. They're designed to make pivoting or hinge movements in applications that don't need to compensate for misalignment.

	Shank
	Thread Size	Ctr. Lg., mm	Thread Lg., mm	ID, mm	Overall Wd., mm	Shank Threading	Overall Thk., mm	Tensile Strength	Specs. Met		Each
Right-Hand Shank Thread







				Black-Oxide Carbon Steel

				M24 × 3 mm	160	120	22	45	Fully Threaded	25	Not Rated	DIN 444	3798K85	000000

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these fittings in a low-pressure pipe line.

Hex-Drive Plugs with Copper Washer

Male

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.

		316 Stainless Steel
	Thread Size	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
Metric Male



		M24 × 1.5 mm	Not Rated	Not Rated	3600N37	000000

External-Hex-Drive Plugs with Copper Washer

Male

				316 Stainless Steel
	Thread Size	Construction	Body Shape	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
Metric Male



		M24 × 1.5 mm	Solid	Hex	Not Rated	Not Rated	3600N18	000000

Ball Joint Rod Ends

Made of steel, these rod ends generally handle higher loads than stainless steel, aluminum, and nylon rod ends. They don’t come lubricated, so you’ll need to lubricate during installation and on an ongoing basis.

Zinc-Plated Carbon Steel—Zinc-plated steel rod ends provide moderate corrosion resistance.

	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



		M24 × 2 mm	95	57	25	47°	60	31	23,450	Zinc-Plated Carbon Steel	Right Hand, Left Hand	60645K59	0000000