M42 Bolts | McMaster-Carr

Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging the drive.

Length is measured from under the head.

Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

		Head, mm
	Lg., mm	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M42 × 4.5 mm

				100	63	42	Fully Threaded	Coarse	170,000	Class 12.9	DIN 912, ISO 4762	1	91290A287	000000


				120	63	42	Fully Threaded	Coarse	170,000	Class 12.9	DIN 912, ISO 4762	1	91290A288	00000
				180	63	42	Partially Threaded	Coarse	170,000	Class 12.9	DIN 912, ISO 4762	1	91290A289	00000
				200	63	42	Partially Threaded	Coarse	170,000	Class 12.9	DIN 912, ISO 4762	1	91290A294	00000

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications, from mounting I-beams to suspending light fixtures.

Medium-Strength Steel

Image of Product. Front orientation. Threaded Rods. Threaded Rods.

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







	M42 × 4.5 mm

	1 m	110,000	Class 8.8	Rockwell C20	DIN 976	99067A143	0000000


	Steel







					M42 × 4.5 mm

					300 mm	110,000	Class 8.8	Rockwell C20	DIN 976	99055A344	000000


					1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A370	000000
					1 m	110,000	Class 8.8	Rockwell C20	DIN 976	99055A345	000000
					2 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A456	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







	M42 × 4.5 mm

	1	150,000	Class 10.9	Rockwell C32	DIN 976	1078N25	0000000


	2	150,000	Class 10.9	Rockwell C32	DIN 976	1078N109	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







	M42 × 4.5 mm

	300 mm	50,000	Rockwell B49	DIN 976	1	94595A255	0000000


	Steel







					M42 × 4.5 mm

					1 m	50,000	Rockwell B49	DIN 976	1	98861A572	000000

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







	M42 × 4.5 mm

	300 mm	70,000	Not Rated	DIN 976	1	90024A323	0000000


	1 m	70,000	Not Rated	DIN 976	1	90024A324	000000

Eyebolts—For Lifting

Also known as machinery eyebolts.

Note: Capacities listed are for vertical lifting only. Eyebolts with shoulder can be used for angular lifting up to 45°, but the capacities will be significantly reduced. For angular lifting, we recommend Hoist Rings. Eyebolts without shoulder are for vertical lifting only.

Warning: Never use to lift people or items over people.

Steel

Closed Eye

With Shoulder

Closed Eye—Closed eyes are stronger than bent-closed eyes.

	Thread						With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Threading	Overall Lg., mm		Each
Closed Eye



		M42 × 4.5 mm	84	84	73	26,300	Fully Threaded	263	3040T25	0000000

Zinc-Plated Steel

Closed Eye

With Shoulder

Zinc-plated steel eyebolts offer good corrosion resistance.

Closed Eye—Closed eyes are stronger than bent-closed eyes.

	Thread							With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Specs. Met	Threading	Overall Lg., mm		Each
Closed Eye



		M42 × 4.5 mm	63	63	80	13,875	DIN 580	Fully Threaded	210	3107T65	0000000

T-Slot Nuts

Slide into T-slot tracks on machine tool tables to secure clamps and workpieces. These nuts are often paired with setup studs for adjustable fixtures.

Metric

Black-Oxide Steel—Create a finished look with a dark, matte coating. These nuts offer minimal corrosion resistance, so they're best for dry environments.

Fully Threaded—Fully threaded nuts allow a stud to extend beyond the bottom of the nut.

DIN 508—Nuts meet DIN dimensional and material requirements. Slide them into DIN 650 T-slots.

			Base, mm					Fully Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm	Specs. Met		Each
Black-Oxide Steel



		48	M42 × 4.5 mm	75	75	30	60	DIN 508	90510A241	0000000

Swivel-Under-Load Hoist Rings—For Lifting


	180° Pivot	360° Swivel

The ball bearing on these hoist rings makes it easy to rotate your load even after it’s suspended. For unbalanced or heavy loads, the base also swivels to compensate for pitch, roll, and sway. Their lifting ring pivots 180° front to back. Ideal for angular lifting, these hoist rings withstand stresses that bend or break eyebolts.

Install the base of these hoist rings flush to your mounting surface. Use a torque wrench to tighten to the recommended torque stamped on the ring.

Note: Capacities listed are for vertical lifting only. As the lift angle changes from vertical, the amount of weight the hoist ring can lift is significantly reduced. For example, when lifting a 1,000 lb. load at a 45° angle, you must choose a hoist ring with a capacity of at least 1,400 lbs. Do not use at an angle less than 30°.

Warning: Never use to lift people or items over people.

Overall Ht., mm	Vert. Cap., lb.	Movement	Specs. Met	Certification		Each







Forged Yellow Powder-Coated Steel

M42 × 4.5 mm	63	70	333	28,210	180° Pivot and 360° Swivel	ASME B30.26	CE Marked	4137N19	000000000

Hoist Rings—For Lifting

180° Pivot

360° Swivel

Designed for angular lifting, hoist rings resist stresses that would bend or break an eyebolt. They have a lifting ring that pivots 180° front to back and a base that swivels 360° to compensate for pitch, roll, and sway when lifting heavy or unbalanced loads. Install the base of the hoist ring flush to the mounting surface and tighten to the recommended torque that is stamped on the ring. Torque wrenches are sold separately.

Warning: Never use to lift people or items over people.

Machined—Machined hoist rings have a smooth finish to protect slings and hooks from damage and excess wear during lifting.

Black-Oxide Steel—Black-oxide steel hoist rings have mild corrosion resistance.

CE Marked—Hoist rings that are CE marked meet European safety standards.

										Each
Thread Size	Thread Lg., mm	Inside Wd., mm	Overall Ht., mm	Vert. Cap., lb.	Movement	Specs. Met	Certification	Mil. Spec.		1-9	10-Up







			Machined Black-Oxide Steel

			M42 × 4.5 mm	79	114	396	27,550	180° Pivot and 360° Swivel	ASME B30.26	CE Marked, Mil. Spec.	MIL-STD-1365, MIL-STD-209	29495T23	0000000	0000000