Rusan M52x0.75 Counter Nut with set screw

• M52x0.75 thread format: built for clip-on devices that use the M52x0.75 interface, helping maintain a correct mechanical fit within a compatible adapter setup.
• Set-screw locking: the integrated set screw lets the counter nut be secured in position, which helps prevent unwanted movement once the adapter is adjusted.
• Useful for thermal clip-on systems: as an accessory for thermal clip-on equipment, it supports a more stable and repeatable connection in a mounting arrangement where alignment matters.
• Compact accessory part: this small component adds a practical adjustment and locking function without changing the overall handling of the clip-on device.
• Black finish: the subdued exterior matches typical clip-on and adapter hardware and keeps the accessory visually discreet on the rifle.

About the Rusan Accessories Series

Rusan Accessories covers the supporting parts that make the company’s mounting and adapter systems more adaptable in real use. The series includes adapters and reduction rings for night-vision and thermal clip-on devices, along with related spare parts and accessory components that help tailor a setup to a specific riflescope, clip-on unit or mounting requirement. This range sits alongside Rusan’s broader catalogue of mounts, rings and rails, but its role is more specialized: it focuses on the small mechanical parts that make a clip-on system practical to configure and maintain.

A key characteristic of the series is that it spans both conventional and modular adapter systems. That gives users a choice between a straightforward dedicated arrangement and a more flexible approach designed to let one clip-on device be shared across multiple rifles or paired with different optics more efficiently. The series reflects Rusan’s long involvement with clip-on mounting solutions, including the adapter concept the company says entered the global market in 2009 and the modular-adapter design that moved from prototype to production in the following decade. In practice, these accessories are aimed at shooters who need reliable fit, repeatable positioning and compatibility across thermal and night-vision equipment.

About the Rusan M52x0.75 Counter Nut with set screw

The Rusan M52x0.75 Counter Nut with set screw is a small but useful accessory for clip-on mounting systems built around an M52x0.75 threaded interface. Its job is straightforward: it provides a locking point within the adapter arrangement so the connected parts can be secured once the desired position is reached. On thermal clip-on equipment, where consistent alignment and a stable mechanical connection are important, that added locking function helps keep the setup orderly and less prone to shifting during handling.

The practical advantage of this version is the integrated set screw. Instead of relying only on thread tension, the counter nut can be fixed more positively after adjustment. That is helpful when a clip-on system is assembled, removed for transport or maintenance, and then reinstalled, because the accessory supports a more controlled and repeatable setup process. As part of the wider Rusan adapter ecosystem, it suits users who already run compatible thermal clip-on hardware and want the mounting arrangement to feel more secure and deliberate in use.

Its black finish keeps the part visually consistent with typical adapter hardware, and the compact format means it adds function without adding bulk. For a clip-on accessory, that matters: the component does not change the character of the system, but it does add a practical locking detail that can make day-to-day handling easier.

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 began producing scope mounts in 1993. That background in machining and firearms-related engineering still defines the brand’s product focus today.

Rusan is best known for manufacturing scope mounts, scope rings, Picatinny rails and firearm tuning products, along with adapter systems for night-vision and thermal-imaging devices. The company introduced its clip-on sight adapter clamp in 2009, a product area that remains closely associated with the brand. This experience in precision-made mounting hardware is especially relevant for clip-on accessories, where fit, alignment and repeatability are central to reliable field use.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Made in: Croatia
• Accessory type: Counter nut with set screw
• Thread: M52x0.75
• Compatible with: Thermal Clip-on
• Color: Black

Warranty

2 years. This accessory is covered by a two-year warranty period.