1 1/8"-12 Reducers | McMaster-Carr

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8 Products

How to Install Helical Inserts

About Helical Insert Length

How to Install Key-Locking Inserts

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

For technical drawings and 3-D models, click on a part number.

Plugs with External Hex Drive

For Use With:
Solid: Air, Steam, Oil, Water, Natural Gas
Solid with Magnet: Air, Steam, Water, Natural Gas
Specifications Met:
BSPP and Metric with Washer: DIN 910
BSPT: DIN 909

UNF Male
Thread Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1 1/8"-12	Solid with Magnet	150 psi @ 72° F	150 psi @ 250° F	Steel	0000000	000000

Black-Phosphate Steel Key-Locking Inserts

A black-phosphate finish provides mild corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole with stripped threads.

For technical drawings and 3-D models, click on a part number.

Inch

Inserts
							Each		Installation Tools
Thread Size	For Tap Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Locking Keys		1-9	10-Up		Each
Black-Phosphate Steel with Thick Wall
1 1/8"-12	1 1/2"-12	1 5/8"	1 7/16"	1 7/16"	4	000000000	000000	000000	000000000	000000

Stainless Steel Helical Inserts

Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

For technical drawings and 3-D models, click on a part number.

Inch

Inserts								Through-Hole Taps		Closed-End Hole Taps
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each
18-8 Stainless Steel—Right-Hand Threaded
1 1/8"-12	1 1/8"	1 5/32"	1 5/32"	MS124-666	1	000000000	00000	000000000	0000000	000000000	0000000
1 1/8"-12	1.688"	1 5/32"	1 5/32"	MS124-706	1	000000000	00000	000000000	000000	000000000	000000

Helical Inserts with Installation Tools

Shown with Five Inserts and Drill Bit

Inserts come with a through-hole tap and installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.

Inch

18-8 Stainless Steel—Right-Hand Threaded
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
1 1/8"-12	1.688"	1 5/32"	1 5/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	0000000