1 5/8"-12 Inserts | McMaster-Carr

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Threaded Insert Type

For Tap Thread Size

For Tap Type

Material

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Number of Locking Keys

Installed Length

1" to 1.999"

External Locking Type

Key

End Type

Open

Key-Locking Insert Wall Type

Color

Tensile Strength

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

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Compliant

Not Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Thread Direction

Right Hand

Thread Fit

Unified Standard Class 2B

Hole Diameter

1.563"

For Material Thickness

Profile

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12 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.

	Inserts								Installation Tools		Inserts with Installation Tools
							Each
	Thread Size	For Tap Thread Size	Installed Lg.	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 1/4"-7	1 5/8"-12	1.813"	1.563"	4	90245A101	000000	000000	92100A754	0000000	2	90245A065	0000000


				1 1/4"-12	1 5/8"-12	1.813"	1.563"	4	90245A104	00000	00000	92100A754	000000	2	90245A066	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.

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







	Black Phosphate-Coated Steel

	1 1/4"-7	1 5/8"-12	1.813"	1.563"	4	2	90245A065	0000000


	1 1/4"-12	1 5/8"-12	1.813"	1.563"	4	2	90245A066	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
Standard (UN) Thread







	For Thick-Wall Inserts

	1 1/4"-7, 1 1/4"-12	1 5/8"-12	Straight	92100A754	0000000

Hollow Plugs

With a hollow construction, these plugs compress for snug fit. Push into threaded and unthreaded holes to mask parts during coating and finishing. When you’re done, grab and pull the flanged edge to remove.

Vinyl Plastic—Durable to resist ripping or shredding, even with repeated use. They also hold up to oils, mild acids, and solvents.

	For Pipe Size	For Thread Size	Ht.	Max. Temp., ° F	Color	Flange Dia.	Pkg. Qty.		Pkg.
Vinyl Plastic



	1.7"	1 1/4	1 5/8"-12	1"	180	Red	2 1/16"	25	9343K22	000000

Hollow Tapered Plugs

A hollow construction makes these plugs extra flexible, so they compress for easy installation and a snug fit. The tapered profile fits a range of hole diameters. If you flip the plug over, it can be used as a cap.

Polyethylene—Convenient and economical. Instead of cleaning and reusing, just toss and grab a new plug.

	For Pipe Size	For Thread Size	Ht.	Max. Temp., ° F	Color	Flange Dia.	Pkg. Qty.		Pkg.
Polyethylene



	1.513" to 1.6"	1 1/4	1 5/8"-12	1/2"	150	Red	1 3/4"	100	4491K71	000000

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 1/4"-7, 1 1/4"-12	1 5/8"-12	A	Slotted End	6721N46	000000

Squeeze-Release Caps

The quickest caps to remove, these release instantly with a pinch of your fingers. They are commonly used to protect threads during shipping and storage or mask against paint and coatings.

Vinyl Plastic—A good all-around choice, these durable caps won’t rip or shred, even with repeated use. They also hold up to oils, mild acids, and solvents. Caps are flexible and conform to parts for a tight fit.

	For Pipe Size	For Thread Size	Inside Ht.	Flexibility	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Vinyl Plastic



	1.548"	1 1/4	1 5/8"-12	3/4"	Flexible	180	Red	25	9343K63	000000

Tapered Caps

Don't worry about having the exact size you need on hand. These caps are shaped to fit a range of ODs—just keep pushing on until they're snug. Because they make less contact with the parts they cover, they’re easier to remove than straight caps. In a pinch, you can flip tapered caps over and use them as plugs.

Polyethylene—Convenient and economical, these flexible caps are one and done. Instead of cleaning and reusing, just toss and grab a new cap.

	For Pipe Size	For Thread Size	Inside Ht.	Flexibility	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Polyethylene



	1.498" to 1.62"	1 1/4	1 5/8"-12	3/4"	Flexible	150	Red	50	4491K74	000000

Screw-On Caps


Polyethylene	Aluminum

Thread onto male pipe and fittings for the most secure fit. These caps keep dust, paint, and coatings out of threads and pipe. They also protect from damage during manufacturing, shipping, and storage.

Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.

Aluminum—Use aluminum caps instead of steel to prevent corrosion from spreading to aluminum pipe and tubing.

	Thread
	Size	Type	For OD	Inside Ht.	Flexibility	Max. Temp., ° F	Color	Mil. Spec.	Pkg. Qty.		Pkg.
Polyethylene







				For Straight-Thread Fittings

				1 5/8"-12	UN	1 5/8"	29/32"	Rigid	150	Red	—	50	1277K129	000000


				Aluminum







								For Straight-Thread Fittings

								1 5/8"-12	UN	1 5/8"	23/32"	Rigid	650	—	MIL-C-5501/3	10	3522T22	00000