M30 Inserts | McMaster-Carr

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29 Products

About Threaded Inserts

Choose the right threaded insert for your application and learn how to install it securely.

Key-Locking Threaded Inserts for Soft Metal

Add strong threads in soft metal, such as aluminum. The keys on these inserts drive into holes to hold more securely than thread-locking or helical inserts. They prevent slipping and rotating, so they’re stable enough for use in vehicle or aerospace parts that experience heavy vibration. These inserts are comparable to Keensert inserts.

To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.

Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.

Black Phosphate-Coated Steel—These inserts resist occasional moisture.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Inserts									Installation Tools		Inserts with Installation Tools
								Each
	Thread Size	For Tap Thread Size	Installed Lg., mm	Drill Bit Size, mm	For Max. Hole Dia., mm	No. of Locking Keys		1-9	10-Up		Each	No. of Inserts Included		Each
Standard Wall







				Black Phosphate-Coated Steel

				M20 x 1.5 mm	M30 x 2 mm	30	28	28	4	90245A205	000000	000000	94010A355	000000	3	90245A331	000000


				M20 x 2.5 mm	M30 x 2 mm	30	28	28	4	90245A201	00000	00000	94010A355	00000	3	90245A326	00000




						18-8 Stainless Steel

						M20 x 1.5 mm	M30 x 2 mm	30	28	28	4	93715A675	00000	00000	94010A355	00000	3	93715A485	000000


						M20 x 2.5 mm	M30 x 2 mm	30	28	28	4	93715A670	00000	00000	94010A355	00000	3	93715A480	000000

Helical Threaded Inserts with Installation Tools

Installation Tool and

Through-Hole Tap

Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
Pronged







	18-8 Stainless Steel

	M30 x 3.5 mm	45	1 1/4"	1.250"	5	Installation Tool Through-Hole Tap	91732A972	0000000

Key-Locking Threaded Inserts with Installation Tools

Paired with the right tool for installation, these inserts create strong threads in soft metal, such as aluminum. They have keys that drive into material to prevent inserts from slipping and rotating in the hole.

Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.

Black Phosphate-Coated Steel—These inserts resist occasional moisture.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Drill Bit Size, mm	For Max. Hole Dia., mm	No. of Locking Keys	No. of Inserts Included		Each
Standard Wall







	Black Phosphate-Coated Steel

	M20 x 1.5 mm	M30 x 2 mm	30	28	28	4	3	90245A331	000000


	M20 x 2.5 mm	M30 x 2 mm	30	28	28	4	3	90245A326	00000




			18-8 Stainless Steel

			M20 x 1.5 mm	M30 x 2 mm	30	28	28	4	3	93715A485	000000


			M20 x 2.5 mm	M30 x 2 mm	30	28	28	4	3	93715A480	000000

Helical Threaded Insert Removal Tools

To remove installed helical inserts, place the tip of these tools into the insert and lightly strike the tool’s head. Then, turn the tool counterclockwise with pressure to extract the insert.

Narrow Profile—The tip of these tools has a narrower angle than standard removal tools to reduce the chance it will dig into your material’s surface when you strike the tool.

	Mfr.		Each
Standard Profile



	1 1/8"-7, 1 1/8"-12, 1 1/4"-7, 1 1/4"-12, 1 3/8"-6, 1 3/8"-12, 1 1/2"-6, 1 1/2"-12, M27, M30, M33, M36, M39	—	90254A114	000000


	Narrow Profile



			1 1/8"-7, 1 1/8"-12, 1 1/4"-7, 1 1/4"-8, 1 1/4"-12, 1 3/8"-6, 1 3/8"-12, 1 1/2"-6, 1 1/2"-8, 1 1/2"-12, M27, M30, M36, M39	Heli-Coil	90254A360	000000

Key-Locking Threaded Insert Drivers

Place the tip of these tools into a key-locking insert after you've threaded it into a hole with your fingers. Then, strike these tools with a hammer to drive the keys into the material and secure the insert. They’re compatible with Keensert inserts.

Choose the tool that matches your insert’s thread size and tap thread size.

		Each
Metric Thread







	For Thick-Wall Inserts

	M20	M30	Straight	94010A355	000000

Helical Threaded Inserts

Pronged

Restore, reinforce, or create threads in metal. The tough coils on these inserts expand once installed to anchor in a tapped hole. Also known as Heli-Coil inserts, they're often used in engine heads and machinery housings where strong connections are critical. Unlike threadlocking inserts, you can remove and reuse them without them losing their strength.

Installation requires a drill bit, a helical insert tap, and an installation tool.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Inserts								Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Inserts with Installation Tools
	Thread Size	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specs. Met	Pkg. Qty.		Pkg.		Each		Each		Each	No. of Inserts Included		Each
Pronged







				18-8 Stainless Steel

				M30 x 3.5 mm	45	1 7/32"	1.219"	SAE MA3279-183	1	92450A145	00000	92450A345	0000000	91709A350	0000000	92450A192	000000	5	91732A972	0000000

Extraction Tools

Remove installed helical inserts.

For Pronged Helical Inserts—Place the tip into pronged inserts and lightly strike the tool’s head. Then, turn the tool counterclockwise with pressure to extract the insert.

		Each
For Pronged Helical Inserts



	1 1/8"-7, 1 1/8"-12, 1 1/4"-7, 1 1/4"-8, 1 1/4"-12, 1 3/8"-6, 1 3/8"-12, 1 1/2"-6, 1 1/2"-8, 1 1/2"-12, M27, M30, M36, M39	90254A360	0000000

Helical Insert Taps

Match the size of helical inserts so they fit tightly when installed in the hole.

High-Speed Steel—These taps resist heat and wear to stay sharp.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

Bottoming Chamfer—Cut all the way to the bottom of blind holes with taps that have the shortest taper. Since these require the most force to turn, they’re often used to finish holes started by taper- or plug-chamfer taps.

						Drill Bit			Plug Chamfer		Bottoming Chamfer
	For Insert Size	Thread Lg.	Overall Lg.	For Insert Thread Type	No. of Flutes	Size	Decimal Size Equiv.	Shank Type		Each		Each
High-Speed Steel







				Uncoated

				M30	1 1/2"	4"	Metric	4	1 7/32"	1.2188"	Square	92450A345	0000000	91709A350	0000000

Key-Locking Threaded Insert Blank Drivers

Hand thread an insert blank into a tapped hole before placing the tip of these tools on the insert. Strike the tool with a hammer to drive the keys into your material.

	Handle Style		Each
Metric Thread



	M30	Straight	93741A320	0000000

Finish-Your-Own Key-Locking Threaded Inserts for Soft Metal

Tap the thread size you need into the solid body of these inserts. They’re a great choice when you need a custom combination of internal thread size and external diameter. Use them to repair or add new threads in soft metal, such as aluminum. They can also plug threaded holes without the hassle of welding. Keys on the inserts drive into material to prevent slipping and rotating in the hole.

Black Phosphate-Coated Steel—These inserts resist occasional moisture.

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

	Inserts								Installation Tools
	For Tap Thread Size	Installed Lg., mm	Max. Tapping Dia., mm	Drill Bit Size, mm	For Max. Hole Dia., mm	No. of Locking Keys		Each		Each
Standard Profile







				Black Phosphate-Coated Steel

				M30 x 2 mm	30	20	28	28	4	93774A320	000000	93741A320	0000000

Screw-Locking Helical Threaded Inserts

Pronged

The irregularly shaped threads tightly grip screws to prevent them from loosening or backing out under vibration. Use these inserts to create or repair threads in pumps and other machinery that shakes and rattles. Also known as Heli-Coil inserts.

Installation requires a drill bit, a helical insert tap, and an installation tool.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Inserts								Through-Hole Taps		Closed-End Hole Taps		Installation Tools
	Thread Size	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specs. Met	Pkg. Qty.		Pkg.		Each		Each		Each
Pronged







				18-8 Stainless Steel

				M30 x 3.5 mm	45	1 7/32"	1.219"	DIN 8140	1	90296A436	000000	92450A345	0000000	91709A350	0000000	92450A192	000000

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



		36	M30 × 3.5 mm	54	54	22	44	DIN 508	90510A238	000000

Extra-Long T-Slot Nuts

With an extra-long base, these nuts carry heavier loads and grip T-slot tracks more securely than standard nuts. Use them to anchor clamps and workpieces to machine tool tables. They’re often paired with setup studs for adjustable fixtures.

Metric


T-Slot Nut and Extra-Long T-Slot Nut Shown Installed Within Cross-Slot

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
Steel



		36	M30 × 3 mm	108	54	22	44	DIN 508	90894A261	000000

Key-Locking Threaded Insert Installation Tools


Style A	Style C

Thread inserts and drive down their keys with a single tool. These tools are compatible with Keensert inserts.

Threaded Insert Installation Tools

Style A

	For Tap Thread Size	Style	Features		Each
For Thick-Wall Inserts



	M20	M30	A	Slotted End	6721N91	000000

Threaded Insert Installation Tools with Spring

Style C

The tradespersons’ choice for installing Mil. Spec. inserts. A spring holds the sleeve under tension, so wobbles and jostles don’t interfere with a clean, professional install.

	For Tap Thread Size	Style	Features		Each
For Thick-Wall Inserts



	M20	M30	C	Slotted End, Sleeve	93904A796	000000

Helical Threaded Insert Installation and Prong Break-Off Tools

T-Handle

Install helical inserts and break off prongs with one tool and a hammer strike. These tools have a slot that grips your insert’s prong for turning both left- and right-hand threads. Slide an insert onto these tools and drive them a quarter-turn to half-turn below the material’s surface. Then, strike the end of the tool with a hammer to break off the prong. These tools work with pronged helical inserts.

Handle Style		Each



1 1/8"-12, 1 1/4"-7, 1 1/4"-8, M30 × 3.5 mm, M30 × 3 mm, M30 × 2 mm, M30 × 1.5 mm	T-Handle	92450A192	000000

Seismic Stay-Put Swivel Leveling Mounts with Threaded Stud

With Cushion

Subjected to rigorous stress tests, these mounts withstand movement in every direction to minimize damage during an earthquake. After leveling your machine, bolt the mount to the floor and tighten the locking nut onto the base for added stability. The ball-and-socket joint in the base swivels to compensate for slightly sloped and pitted floors. For mounting versatility, you can install these mounts in either threaded holes or unthreaded through holes at the bottom of equipment.

304 Stainless Steel Base—The choice for most wet locations, these mounts can withstand repeated washdowns without corroding. However, they won't hold up to cleaning solutions that contain harsh chemicals like 316 stainless steel can.

Rubber Cushion—A cushion under the base protects floors from scrapes and gouges.

										With Rubber Cushion
					Mounting Holes					Cap. per Mount, lb.
	Thread Size	Thread Lg.	Swivel Range of Motion	Base Dia.	No. of	Fasteners Included	Dia.	Ctr.-to-Ctr. Lg.	Specs. Met	Load	Pull	Overall Ht.	Cushion Material		Each
304 Stainless Steel Base and Stud



		M30 × 3.5 mm	7 1/8"	10°	5 7/8"	3	No	17/32"	4 3/32"	NZS 4219	13,480	6,290	11 3/8"	Buna-N	7750N111	0000000

Swivel Leveling Mounts with Threaded Stud


Without Cushion	With Cushion

Keep equipment level on slightly sloped and pitted floors with mounts that have a ball-and-socket joint in the base. For mounting versatility, you can install them in either threaded holes or unthreaded through holes at the bottom of equipment.

Nickel-Plated Steel Base—With a shiny appearance, these mounts create a finished look. They're best for dry environments since the nickel plating offers minimal corrosion resistance.

Zinc-Yellow-Chromate-Plated Steel Base—More corrosion resistant than nickel-plated steel, these mounts are suitable for damp environments. However, they won’t hold up to chemical cleaners, high-pressure washdowns, and other harsh conditions like stainless steel can.

303 Stainless Steel Base—The choice for most wet locations, these mounts can withstand repeated washdowns without corroding. However, they won't hold up to cleaning solutions that contain harsh chemicals like 316 stainless steel can.

Rubber Cushion—A cushion under the base grips surfaces so vibrating equipment doesn't slide. It also protects floors from scrapes and gouges.

					Without Cushion				With Rubber Cushion
	Thread Size	Thread Lg., mm	Swivel Range of Motion	Base Dia., mm	Cap. per Mount, lb.	Overall Ht., mm		Each	Cap. per Mount, lb.	Overall Ht., mm	Cushion Material		Each
Nickel-Plated Steel Base and Stud



		M30 × 3.5 mm	152	7.5°	152	42,500	222	6111K661	0000000	32,250	225	Natural Rubber	6111K672	0000000


		Zinc-Yellow-Chromate-Plated Steel Base and Stud



				M30 × 3.5 mm	152	7.5°	152	42,990	222	6301K44	000000	32,295	225	Natural Rubber	6301K47	000000


				303 Stainless Steel Base and Stud



						M30 × 3.5 mm	152	7.5°	152	—	—	———	0	32,200	225	Natural Rubber	6301K121	000000