Rusan Screw for bases M4x0.5 (L=7 mm)

• M4x0.5 Thread Format: This screw matches base interfaces that require an M4x0.5 thread, helping maintain proper fit and secure attachment without forcing incompatible hardware.
• 7 mm Length: The 7 mm body length suits base applications where correct screw depth matters, reducing the risk of poor engagement or excess protrusion.
• Made for Mounts: Designed as a mounting accessory, it is intended for scope-mount base use where consistent fastening supports repeatable optic alignment.
• Black Finish: The black finish blends neatly with most mounts and bases while giving the hardware a subdued, low-visibility appearance.

About the Rusan Accessories Series

Rusan Accessories covers the smaller but essential components that keep mounting and adapter systems working as intended. Within the wider Rusan lineup, this series supports the company’s scope mounts, rails, adapter systems and related hardware with purpose-built parts rather than generic substitutes. That matters in shooting equipment, where thread pitch, screw length and fit can directly affect mounting security and repeatability.

The series sits alongside Rusan’s better-known mounting and adapter products and reflects the same practical design approach: parts are made for specific tasks, whether that means supporting conventional mounting systems or the company’s night-vision and thermal clip-on adapter solutions. Rusan Accessories therefore includes not only adapters and reduction rings, but also the spare parts and fastening components needed to keep those systems serviceable over time. For users who want to maintain an existing mount correctly, these accessories provide the exact interface and dimensions required for a clean, dependable installation.

About the Rusan Screw for bases M4x0.5 (L=7 mm)

The Rusan Screw for bases M4x0.5 (L=7 mm) is a dedicated mounting screw intended for base applications where the correct thread and length are more important than they may first appear. In scope mounting, a small fastening part has a direct effect on how securely the base sits and how consistently the optic system holds its position under recoil and regular handling. By using the specified M4x0.5 thread, this screw is suited to base interfaces designed around that pitch, helping avoid the damage and poor seating that can come from near-match hardware.

The 7 mm length is equally important in practice. A screw that is too short may not provide enough thread engagement, while one that is too long can bottom out or interfere with the mounting surface. This model is therefore best understood as a precise replacement or service part for compatible Rusan mounting setups, where maintaining the original dimensions helps preserve proper installation. Its black finish keeps the appearance discreet and visually consistent with most mounts and bases, which is useful on hunting optics and general rifle setups where low-reflection hardware is preferred. For routine maintenance, repair or replacement of worn fasteners, this screw provides the correct format for a tidy and mechanically appropriate fit.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, with 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 explains why Rusan remains closely associated with practical firearm-interface products rather than general outdoor optics.

Today, the company manufactures scope mounts, scope rings, Picatinny rails and firearm tuning products, and it is also well known for adapter systems used with night-vision and thermal clip-on devices. Rusan introduced its clip-on sight adapter clamp in 2009, a product area that became an important part of the brand’s identity. Across its range, the company focuses on precisely machined mounting solutions and accessory parts made for specific rifle and optic combinations.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Accessory Type: Screw for bases
• Thread: M4x0.5
• Length: 7 mm
• Accessories for: Mounts
• Color: Black

Warranty

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