Rusan adapter locking screw (M4x10)

• Clip-on adapter spare part: This locking screw is made for thermal clip-on adapter setups, helping keep the adapter assembly properly secured during mounting and removal.
• M4x10 format: The defined thread and length make it suitable for the intended Rusan adapter application, so replacement is straightforward when the original screw is worn or misplaced.
• Compact metal component: A small fastening part like this is easy to carry as a field spare, which helps avoid downtime if a screw is lost during transport or setup.
• Black finish: The dark exterior matches typical adapter hardware and keeps the part visually discreet on hunting optics and thermal clip-on equipment.
• Made in Croatia: Production in Croatia reflects Rusan’s established focus on machining and mounting components for sporting and shooting applications.

About the Rusan Accessories Series

Rusan Accessories covers the supporting parts that keep the company’s mounting and adapter systems working as intended in the field. The series includes adapters and reduction rings for night-vision and thermal clip-on devices, along with accessory parts and spares for those systems. This makes the range particularly relevant for hunters and shooters who use clip-on equipment across more than one rifle or who want to maintain an existing setup rather than replace a complete adapter.

A defining trait of the series is its connection to Rusan’s conventional and modular adapter systems. These products are built around practical compatibility, allowing one clip-on device to be paired with different riflescopes or different rifles to be configured around the same thermal or night-vision unit. Within that broader system, smaller parts such as screws, rings and adapter accessories matter because they support correct fit, repeatable mounting and dependable day-to-day handling. The series therefore sits alongside Rusan’s mounts, rings and rails as a functional extension of the company’s firearm and clip-on mounting expertise.

About the Rusan adapter locking screw (M4x10)

The Rusan adapter locking screw (M4x10) is a small but important spare part for a thermal clip-on adapter system. In practical use, components like this are what keep an adapter properly assembled and ready for repeated installation, removal and transport. When a locking screw becomes damaged, stripped or lost, replacing that single part can restore the adapter’s normal function without the need to replace the entire mounting assembly.

The M4x10 format gives this screw its intended fit for the relevant Rusan adapter application, while the black finish keeps it visually consistent with surrounding mounting hardware. As an accessory for clip-on equipment, it is particularly useful for users who depend on a thermal attachment in the field and want to keep essential spares on hand. A compact fastening part takes up almost no room in a kit, yet it can prevent unnecessary interruption when maintaining or reconfiguring hunting optics.

Because Rusan’s adapter systems are used to connect riflescopes with thermal clip-on devices, even a simple replacement screw has a clear role: it helps preserve the secure, correct relationship between the adapter and the rest of the mounting setup. For users already invested in the Rusan ecosystem, this accessory supports straightforward upkeep of a working clip-on configuration.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, Croatia, with roots in the Rusan family’s metalworking business dating back to 1983. Željko Rusan opened a gunsmith shop in 1986, and the company later began producing scope mounts in 1993. This background in machining and firearms support equipment remains central to the brand today.

Rusan is known for producing scope mounts, scope rings, Picatinny rails and adapter clamps, with a strong focus on connecting riflescopes to night-vision and thermal-imaging devices. The company introduced its clip-on sight adapter clamp in 2009, a product area that became closely associated with the brand. Alongside adapter systems, Rusan also manufactures rails for rifle platforms such as Tikka, Sauer and Zastava, as well as other firearm tuning products.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Product type: Accessory
• Compatible with: Thermal Clip-on
• Color: Black
• Country of manufacture: Croatia

Warranty

Rusan provides a 2-year warranty for this accessory.