Rusan M33.5x0.75 Counter Nut

• Thread-specific fit: The M33.5x0.75 thread matches compatible thermal clip-on interfaces, helping maintain a secure mechanical connection without improvised spacers or mismatched parts.
• Compact steel construction: Made from steel, this counter nut adds dependable thread support and wear resistance while remaining light enough at 10.00 g not to burden the adapter setup.
• Supports clip-on alignment: As part of a clip-on mounting system, the counter nut helps lock components in place so the adapter assembly stays properly tensioned during repeated installation and removal.
• Accessory for thermal clip-ons: Built for thermal clip-on applications, it suits users who need a small but important spare or replacement part to keep an adapter system complete and serviceable.
• Low-profile finish: The black finish keeps the part visually discreet and consistent with typical hunting optics and thermal accessory setups.

About the Rusan Accessories Series

Rusan Accessories is the supporting hardware range behind the company’s clip-on and mounting systems. The series covers adapters, reduction rings, spare parts and accessory components used to connect night-vision and thermal clip-on devices to riflescopes in a practical, repeatable way. A key theme of the range is flexibility: Rusan offers both conventional and modular adapter systems, allowing users to configure a setup around one device, one riflescope or several rifles as needed.

The series is especially relevant for hunters and shooters who use front-mounted thermal or night-vision attachments and need the small interface parts that make a system work correctly. Rusan’s modular-adapter concept was developed so that one clip-on device can be shared across multiple rifles or paired with different optics with fewer dedicated parts. Alongside complete adapters, the series includes the thread-specific accessories that help maintain fit, alignment and serviceability over time. That makes Rusan Accessories less about adding features and more about ensuring that a clip-on mounting system remains secure, adaptable and easy to configure in the field.

About the Rusan M33.5x0.75 Counter Nut

The Rusan M33.5x0.75 Counter Nut is a small but important mounting accessory for clip-on systems that use this thread standard. In a thermal clip-on setup, the quality of the connection between the device-side thread and the adapter hardware matters just as much as the larger clamp or connector. A correctly matched counter nut helps the assembly seat properly, supports consistent tension on the threaded interface and reduces the chance of movement caused by vibration or repeated handling.

This model is intended for thermal clip-on use and is best understood as a practical service part for keeping an adapter system complete, functional and correctly fitted. Its steel construction gives it the rigidity and thread durability expected from a component that may be installed, adjusted or replaced as part of routine equipment maintenance. At only 10.00 g, it adds almost no noticeable weight, which is useful on front-mounted clip-on systems where unnecessary mass can affect handling and balance.

The black finish keeps the part visually unobtrusive and consistent with surrounding adapter hardware. For users building or maintaining a Rusan-based clip-on interface, the main value of this counter nut is simple: it provides the correct M33.5x0.75 threaded component for a secure, tidy and mechanically appropriate installation.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, with roots in the Rusan family’s metalworking business dating to 1983. Željko Rusan opened a gunsmith shop in 1986, and the company moved into scope-mount production in 1993. That background in machining and firearms fitting still defines the brand’s product focus today.

Rusan is best known for scope mounts, rings, Picatinny rails and firearm tuning products, along with adapter systems for night-vision and thermal devices. The company introduced its clip-on sight adapter clamp in 2009, and that category remains one of its most recognized specialties. In practical terms, Rusan’s reputation comes from producing thread-specific, rifle-specific and device-specific mounting components that solve real compatibility problems without unnecessary complexity.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Made in: Croatia
• Accessory type: Counter nut
• Thread: M33.5x0.75
• Compatible with: Thermal Clip-on
• Material: Steel
• Weight: 10.00 g
• Color: Black

Warranty

2 years. Rusan provides this counter nut with a 2-year warranty period.