M20 Thread Threaded Inserts

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20 mm

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Key-Locking Insert Wall Type

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Standard

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Specifications Met

43 Products

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

				M14 x 1.5 mm	M20 x 1.5 mm	20	18.75	18.75	4	90245A185	000000	000000	94010A340	000000	4	90245A306	000000


				M14 x 2 mm	M20 x 1.5 mm	20	18.75	18.75	4	90245A186	00000	00000	94010A340	00000	4	90245A301	00000
				M20 x 1.5 mm	M30 x 2 mm	30	28	28	4	90245A205	00000	00000	94010A355	00000	3	90245A331	00000
				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

						M14 x 1.5 mm	M20 x 1.5 mm	20	18.75	18.75	4	93715A650	00000	00000	94010A340	00000	—	———	0


						M14 x 2 mm	M20 x 1.5 mm	20	18.75	18.75	4	93715A645	00000	00000	94010A340	00000	4	93715A455	000000
						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 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



	6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 3/4"-10, 3/4"-16, 7/8"-9, 7/8"-14, 1"-8, 1"-12, 1"-14, M4, M5, M6, M7, M8, M9, M10, M12, M13, M14, M15, M16, M18, M20, M22, M24	—	90254A113	000000


	Narrow Profile



			7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 1/2"-28, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 5/8"-24, 3/4"-10, 3/4"-16, 3/4"-20, 7/8"-9, 7/8"-14, 7/8"-20, 1"-8, 1"-12, 1"-14, M12, M14, M16, M18, M20, M22, M24	Heli-Coil	90254A330	00000

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

				M20 x 1.5 mm	30	13/16"	0.813"	SAE MA3279-172	1	92450A111	00000	92450A311	0000000	92450A623	0000000	92450A612	0000000	—	———	0


				M20 x 2.5 mm	20	13/16"	0.813"	DIN 8140, SAE MA3279-124	1	91732A681	0000	91709A375	000000	91709A572	000000	90261A212	000000	—	———	0
				M20 x 2.5 mm	30	13/16"	0.813"	DIN 8140, SAE MA3279-174	1	91732A683	0000	91709A375	000000	91709A572	000000	90261A212	000000	4	91732A075	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



	7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 1/2"-28, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 5/8"-24, 3/4"-10, 3/4"-16, 3/4"-20, 7/8"-9, 7/8"-14, 7/8"-20, 1"-8, 1"-12, 1"-14, M12, M14, M16, M18, M20, M22, M24	90254A330	000000

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

	M14 x 1.5 mm	M20 x 1.5 mm	20	18.75	18.75	4	4	90245A306	000000


	M14 x 2 mm	M20 x 1.5 mm	20	18.75	18.75	4	4	90245A301	00000
	M20 x 1.5 mm	M30 x 2 mm	30	28	28	4	3	90245A331	00000
	M20 x 2.5 mm	M30 x 2 mm	30	28	28	4	3	90245A326	00000




			18-8 Stainless Steel

			M14 x 2 mm	M20 x 1.5 mm	20	18.75	18.75	4	4	93715A455	000000


			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

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

	M14	M20	Straight	94010A340	000000


	M20	M30	Straight	94010A355	00000

Thread-Locking Threaded Inserts

With Loctite® adhesive already on the threads, these inserts won’t back out or vibrate loose. The adhesive reaches full strength after 72 hours. Unlike helical inserts, you can install them with a standard drill and tap. However, thread-locking inserts are difficult to remove and reuse.

After drilling and tapping your hole, install inserts with a wrench or an installation bit. To use a wrench, thread an insert and two hex nuts onto a bolt. Then, grip and turn the top nut to drive into the hole. For slotted inserts, you can drive with a slotted screwdriver instead.

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.

	Inserts									Installation Tools
	Thread Size	For Tap Thread Size	Installed Lg., mm	Drill Bit Size, mm	For Max. Hole Dia., mm	Drive Style	Pkg. Qty.		Pkg.		Each
Standard Wall







				Black Phosphate-Coated Steel

				M20 x 2.5 mm	M36 x 4 mm	30	33	33	Slotted	1	97084A310	000000	94110A250	000000

Tapping Threaded Inserts for Soft Metal

No need to tap the hole, these inserts cut their own threads into soft metal, such as aluminum. The teeth dig into the material to keep them secure when installing and removing screws. To install inserts with a wrench, thread an insert and two hex nuts onto a bolt. Then, grip and turn the top nut to drive into a drilled hole. If you need to add a lot of threaded connections quickly, use an installation tool with a ratchet wrench or drill press. These inserts are comparable to Tap-Lok inserts.

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

Zinc-Plated Steel—A step up from plain steel, the plating withstands occasional exposure to moisture.

	For Max. Hole Dia.		Each
Standard Wall







	Zinc-Plated Steel

	M20 x 2.5 mm	27	63/64"	0.984"	90240A612	000000

Easy-Start Helical Threaded Insert Installation Tools

These tools compress the diameter of your insert so it fits easily into a tapped hole. They’re the best choice for preventing misaligned or damaged threads—just make sure you have space to turn the crank. Screw or slide an insert onto your tool and drive it between a quarter-turn and half-turn below the surface. Also known as prewinders.

Threaded Insert Installation Tools with Depth Stop

T-Handle


Prong Slot Drive	Threaded Drive

Ensure consistent installation across multiple inserts. Set your desired installation depth, and the stop will prevent you from driving your insert any further.

Prong Slot Drive Helical Insert Tool—Install both left- and right-hand threaded inserts with any thread pitch. However, these tools don't align the threads like threaded-drive tools, so installation may be more difficult.

Threaded Drive Helical Insert Tool—These tools align each coil of your insert perfectly with the thread pitch of your tapped hole for easy installation.

	Mfr.	Handle Style	Helical Insert Tool Drive Type	For Use With		Each
Metric Thread



	M20 × 1.5 mm	—	T-Handle	Prong Slot	Helical Inserts, Screw-Locking Helical Inserts	92450A612	0000000


	M20 × 2.5 mm	—	T-Handle	Prong Slot	Helical Inserts, Screw-Locking Helical Inserts	1338N73	000000
	M20 × 2.5 mm	Heli-Coil	T-Handle	Threaded	Helical Inserts, Screw-Locking Helical Inserts	90261A212	000000

Helical Threaded Inserts with Installation Tools

Drill Bit, 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

	M20 x 2.5 mm	30	13/16"	0.813"	4	Drill Bit Installation Tool Through-Hole Tap	91732A075	0000000

Installation Bits for Slotted-Drive Threaded Inserts

For fast installation, use these installation bits with power drills and drill presses.

For Thread Size	Hex Shank Size		Each
M20, M24	3/8"	94110A250	000000

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

				M20 x 2.5 mm	20	13/16"	0.813"	SAE MA3329-124	1	90296A427	00000	91709A375	0000000	91709A572	0000000	90261A212	0000000


				M20 x 2.5 mm	30	13/16"	0.813"	SAE MA3329-174	1	90296A425	0000	91709A375	000000	91709A572	000000	90261A212	000000

High-Capacity Press-Fit Leveling Mount Inserts

Rated for high load capacity, use these inserts to connect threaded leveling mounts to machinery, instrument bases, and conveyor equipment with tubular legs. These inserts have pass-through holes that are partially threaded at the base. Tap mounts into place with a rubber hammer.

For Square Legs


Shown with Brass Insert Installed

Plastic with Brass Insert—Move equipment around your workspace and make frequent adjustments without worrying about stripping the brass threads.

	For Leg						Thread
	Outer Lg.	Outer Wd.	Inner Lg.	Inner Wd.	Cap. per Mount, lb.	Overall Ht.	, mm	Size	Type	Dp.	Temp., ° F		Each
Plastic with Brass Insert



		1 1/2"	1 1/2"	1 5/16"	1 5/16"	1,500	1 11/16"	2.5	M20	Metric	1"	-20 to 180	60945K78	00000


		2"	2"	1 3/4"	1 3/4"	2,000	2"	2.5	M20	Metric	1"	-20 to 180	60945K83	0000

For Round Legs


Shown with Brass Insert Installed

Plastic with Brass Insert—Move equipment around your workspace and make frequent adjustments without worrying about stripping the brass threads.

	For Leg				Thread
	ID	OD	Cap. per Mount, lb.	Overall Ht.	, mm	Size	Type	Dp.	Temp., ° F		Each
Plastic with Brass Insert



		1 13/16"	2"	2,000	1 15/16"	2.5	M20	Metric	1"	-20 to 180	60945K98	00000

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



	M14	M20	A	Slotted End	6721N88	000000


	M20	M30	A	Slotted End	6721N91	00000

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



	M14	M20	C	Sleeve, Slotted End	93904A793	000000


	M20	M30	C	Sleeve, Slotted End	93904A796	00000

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



3/4"-16, M20 × 1.5 mm, M20 × 2 mm, M20 × 2.5 mm	T-Handle	92450A187	000000