How to find the right Key Locking Inserts AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Key Locking Inserts
- Size series
- Choose between thin-wall (lightweight) and heavy-duty series based on the parent material's strength and the available wall thickness. Heavy-duty series need a larger hole but resist pull-out better in soft metals.
- Key installation
- Drive the keys flush with the insert's tool-specified drive punch after the insert is seated slightly below the surface. The keys cut into the parent material to lock the insert against rotation.
- Insert material
- Specify carbon steel, stainless or a high-strength alloy to suit load and corrosion, especially in aluminum. Material affects strength and galvanic corrosion risk.
- Removability
- Confirm the insert can be drilled out and replaced with the same size if damaged. Replaceability is a main reason to choose key-locking inserts for high-wear threads.
Brands that matter
- Keensert: The best-known key-locking insert line, used in aerospace and defence.
- E-Z Lok: Offers key-locking style inserts alongside self-tapping types.
What to avoid
- Tapping the hole with a standard tap when the insert specifies a specific external thread
- Driving keys with an improvised punch that mushrooms them
Questions
Key-locking or helical for a stripped hole?
Key-locking inserts are solid and mechanically locked, so they resist backing out and suit high torque or frequently serviced threads. Helical inserts are lighter and cheaper.