Rusan M33.5x0.75 Counter Nut with set screw

• Self-positioning set screw: helps the counter nut return to the same position after removal and reinstallation, which supports repeatable clip-on alignment and reduces setup time in the field.
• M33.5x0.75 thread format: matches thermal clip-on devices that use this thread standard, making it a correct fit for TA435-pattern applications without improvised adapters.
• Built for conventional adapter setups: adds a practical positioning aid to Rusan’s conventional clip-on adapter system, especially useful when the device is removed between outings.
• Compact accessory with a clear purpose: this is a small but important part for keeping a clip-on mounting interface organized, secure, and easier to reinstall consistently.
• Black finish: keeps the accessory visually discreet and well matched to typical thermal clip-on and riflescope mounting hardware.

About the Rusan Accessories Series

Rusan Accessories is the support range around the company’s adapter systems for night-vision and thermal clip-on devices. The series includes adapters, reduction rings, spare parts, and small mounting components that help configure a clip-on setup correctly for a specific device and riflescope combination. A key idea behind the range is flexibility: Rusan offers both conventional and modular adapter systems, allowing users to build either a simple dedicated setup or a more adaptable system that can be shared across multiple rifles or optics.

Within this series, the emphasis is on practical mechanical compatibility rather than unnecessary complexity. Threaded parts, locking components, and accessory pieces are designed to help the clip-on unit sit correctly on the host optic and to keep installation repeatable. The range also reflects Rusan’s long involvement with clip-on mounting solutions, including products for specific thermal and night-vision devices as well as the smaller parts needed to maintain or fine-tune those systems. For hunters and other users who rely on front-mounted thermal or night-vision attachments, Rusan Accessories provides the hardware that turns a compatible device into a usable field setup.

About the Rusan M33.5x0.75 Counter Nut with set screw

The Rusan M33.5x0.75 Counter Nut with set screw is a dedicated accessory for thermal clip-on systems that use the M33.5x0.75 thread pattern, including TA435-type applications. Its role is straightforward but important: it helps secure the threaded interface and adds a positioning function that is useful when a clip-on device is removed and later mounted again. In practice, that means less trial-and-error when returning the device to the setup and a more orderly mounting process.

What distinguishes this version from a regular counter nut is the set screw. That detail gives the part a self-positioning function, helping the nut stay fixed at the chosen point once adjusted. For users of conventional adapter systems, this is especially valuable because the clip-on may not remain permanently assembled to the same host optic. A repeatable stop point can make reinstallation faster and more consistent, which is exactly what matters with clip-on equipment where alignment and mounting position affect overall usability.

Its black finish and compact form keep it unobtrusive alongside the rest of the mounting hardware, while the thread-specific design ensures it is intended for the correct device interface rather than as a universal workaround. For anyone building or maintaining a Rusan clip-on adapter setup around an M33.5x0.75 thermal device, this counter nut is a small but functional part of a cleaner, more repeatable mounting system.

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 moved into producing scope mounts in 1993. That background still shows in the product range today, which focuses on mechanically precise shooting accessories such as scope mounts, rings, Picatinny rails, and firearm tuning products.

Rusan is particularly well known for its adapter solutions for night-vision and thermal-imaging devices. The company introduced its clip-on sight adapter clamp in 2009, and it continues to produce adapter clamps and related accessories for clip-on systems. Alongside these products, Rusan also manufactures rails for rifle platforms including Tikka T3, Sauer 202, and Zastava M70. The brand’s reputation in this category comes from practical engineering, broad compatibility, and a strong focus on mounting hardware for hunting optics and clip-on use.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Made in: Croatia
• Accessory for: Thermal Clip-on
• Color: Black
• Thread: M33.5x0.75

Warranty

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