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.
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How to Install Helical Inserts
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About Helical Insert Length
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How to Install Key-Locking Inserts
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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.

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

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