1 1/8"-7 Reducers | McMaster-Carr

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Coarse

Key-Locking Insert Wall Type

11 Products

Helical Threaded Insert Installation Tools

T-Handle

Install your pronged helical inserts into tapped holes. Screw an insert onto these tools and drive them a quarter to half-turn below the material’s surface.

	Handle Style	For Use With		Each
Standard (UN) Thread



	1 1/8"-7	T-Handle	Helical Inserts, Screw-Locking Helical Inserts	93060A113	0000000

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

	1 1/8"-7	1.688"	1 5/32"	1.156"	5	Drill Bit Installation Tool Through-Hole Tap	91732A322	0000000

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
Standard (UN) Thread







	For Thick-Wall Inserts

	1 1/8"-7, 1 1/8"-12	1 1/2"-12	Straight	92100A749	0000000

Key-Locking Threaded Insert Installation Tools

Style A

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

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



	1 1/8"-7, 1 1/8"-12	1 1/2"-12	A	Slotted End	6721N45	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.

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







	Black Phosphate-Coated Steel

	1 1/8"-7	1 1/2"-12	1.438"	1 7/16"	1.438"	4	2	90245A063	0000000

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.

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







				Black Phosphate-Coated Steel

				1 1/8"-7	1 1/2"-12	1.438"	1 7/16"	1.438"	4	90245A091	000000	000000	92100A749	0000000	2	90245A063	0000000

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		Inserts with Installation Tools
	Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Specs. Met	Pkg. Qty.		Pkg.		Each		Each	No. of Inserts Included		Each
Pronged







				18-8 Stainless Steel

				1 1/8"-7	1.125"	1 11/64"	1.172"	MS122091	1	91732A141	00000	91709A116	0000000	91709A500	0000000	—	———	0


				1 1/8"-7	1.688"	1 11/64"	1.172"	MS122131	1	91732A143	0000	91709A116	000000	91709A500	000000	5	91732A322	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