M39x1 to M52x0.75 Thread Adapter: How to Choose
By Professor Optiken - Zieloptiken, Ferngläser & Reflexvisiere | Published: 2026-10-27
Category: How-to Guides
Learn how to select the right Gewindering M39x1 auf M52x0,75 for your thermal clip-on or night vision device. Step-by-step diagnosis for Lahoux, ATN, and Armasight.
Quick answer
If you need to attach a clip-on device with an M39x1 male thread (e.g., Lahoux LV21, ATN, or Armasight) to a standard M52x0.75 clamp adapter, the Professor Optiken Gewindering M39x1 auf M52x0,75 is the correct adapter ring.
Why thread pitch matters
The M39x1 and M52x0.75 designations specify both diameter and thread pitch. A mismatch in pitch can cause cross-threading or a loose fit. The M39x1 ring has a coarse 1 mm pitch, while the M52x0.75 clamp adapter uses a finer 0.75 mm pitch. Using the correct adapter ensures a secure, wobble-free connection.
Some devices have a non-standard thread or a proprietary mounting system. If your device does not have a standard M39x1 male thread, this ring will not fit. Check your device's specification before ordering.
Diagnosis: Is the M39x1 to M52x0.75 ring right for you?
- Symptom: You have a clip-on or night vision device (e.g., Lahoux LV21, ATN, Armasight) and want to attach it to a riflescope objective using a clamp adapter, but the threads don't match.
- Likely cause: Your device has an M39x1 male thread, but your clamp adapter has an M52x0.75 female thread. Without an adapter ring, they cannot connect. Measure the external thread diameter and pitch on your device to confirm it is M39x1.
- Corrective action: Order the Professor Optiken Gewindering M39x1 auf M52x0,75. Screw the ring onto your device's M39x1 thread, then attach the assembly to your M52x0.75 clamp adapter. Ensure the ring is hand-tight; do not overtighten. After mounting, check that the device is centered and does not wobble. If it fits loosely, the thread may be incorrect.
- Stop or choose another option: If your device does not have an M39x1 male thread (e.g., it uses a different pitch or a bayonet mount), this ring will not work. In that case, look for a dedicated adapter for your specific device model or contact support for compatibility advice.
Product facts
- Professor Optiken Gewindering M39x1 mm auf M52x0,75 mm (Lahoux, ATN): The Professor Optiken Gewindering M39x1 mm auf M52x0,75 mm is compatible with our clamp adapters that have an M52x0.75 mm internal thread. It allows all clip-on devices with an M39x1 mm external thread (e.g., ATN, Armasight, Lahoux LV21) to be connected. You can use a single standard clamp adapter for multiple devices, saving cost and setup time.
Professor Optiken Gewindering M39x1 mm auf M52x0,75 mm (Lahoux, ATN)
