How to Install Helical Inserts
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How to Install Key-Locking Inserts
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Slotted-Drive Male-Female Round Thread Adapters
18-8 stainless steel adapters resist corrosion better than brass adapters. They also withstand wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Gender | Thread Fit | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
(A) | Pitch (A), mm | (B) | Pitch (B), mm | (A) | (B) | (A) | (B) | (A) | (B) | Hardness | Each | |
18-8 Stainless Steel | ||||||||||||
| M4 | 0.7 | M2 | 0.4 | 6.4mm | 6.4mm | Male | Female | Class 6G | Class 6H | Not Rated | 000000000 | 000000 |
18-8 Stainless Steel Key-Locking Inserts
Made of stainless steel, these inserts have good 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. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
For technical drawings and 3-D models, click on a part number.
High-Strength A286 Stainless Steel Key-Locking Inserts
The strongest and most corrosion-resistant stainless steel key-locking inserts we offer. Made of A286 stainless steel, these inserts stand up to salt water, harsh chemicals, and even high temperatures. Since you drive the keys into the surrounding material, these inserts also give you a more secure hold than thread-locking inserts. Use them to repair or add new, reusable threads to aluminum and other soft metal. They’re comparable to Keensert® inserts.
Install them using a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
For technical drawings and 3-D models, click on a part number.
Screw-Locking Key-Locking Inserts
Forming the strongest hold of any of our threaded inserts, these inserts have a distorted internal thread to lock screws into place and keys that drive into surrounding material to prevent slipping and rotating. This creates a mechanical lock, which is stronger than the chemical lock from adhesive on thread-locking inserts. Because they’re made of a solid piece of metal, these inserts are also stronger than helical inserts, which are made of coiled wire. They're often used in molds, tools and dies, and suspension systems in vehicles to create completely new threads, add strong threads in soft metal, or replace existing threads that are damaged or need to be resized.
A dry-film lubricant makes it easy to install them and screw fasteners in. To install, use a tap to create the threads in your material and an installation tool to drive the keys into the material. All are made to tight tolerances with strictly controlled materials. Many inch sizes also meet military or aerospace standards for dimensions and material.
These inserts resist corrosion in wet environments. Cadmium-plated steel inserts are stronger than 18-8 stainless steel inserts.
Inserts with thin walls are best for small holes or near the edge of a workpiece. They’re often used in electronics that require small fasteners.
For technical drawings and 3-D models, click on a part number.
Inserts | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Tap | Installation Tools | |||||||||||
| Thread Size | Thread Pitch, mm | Thread Spacing | Thread Size | Thread Pitch, mm | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | Each | Each | ||
18-8 Stainless Steel with Thin Wall | ||||||||||||
| M2 | 0.4 | Coarse | M4 | 0.7 | 3 | 3.4 mm | 3.4 mm | 2 | 000000000 | 000000 | 000000000 | 000000 |
Cadmium-Plated Steel with Thin Wall | ||||||||||||
| M2 | 0.4 | Coarse | M4 | 0.7 | 3 | 3.4 mm | 3.4 mm | 2 | 000000000 | 00000 | 000000000 | 00000 |