# Screw-Locking Key Inserts · Selection notes

External keys restrain the insert; internal locking geometry acts on the mating screw. Understanding both functions determines the validation method.

## How it works

Screw-locking key inserts combine external locking keys with an internal screw-locking feature. The keys resist rotation relative to the parent material; the internal feature resists screw rotation. Refer to the selected model's drawing for its internal geometry.

## Selection guidance

- Internal locking design：Confirm from the drawing, not the model name alone.
- Mating screw：Material, finish, lubrication and strength requirements.
- Acceptance method：Define installation checks and locking-torque checks.
- Maintenance requirements：Disassembly frequency and permitted replacement procedure.

## Installation overview

1. Confirm the screw combination：Specify screw finish, lubrication and torque requirements.
2. Install and position：Install the solid insert according to the approved process.
3. Key installation：Complete the mechanical lock between insert and parent material.
4. Check both functions：Inspect the locking keys and screw-locking performance separately.


Actual dimensions, performance and installation must follow the approved drawings and technical agreement.

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