Arlington Industries MB5741 Non-Metallic Siding Mounting Block

Arlington Industries MB5741 Non-Metallic Siding Mounting Block, 5" x 7", White

The Arlington Industries MB5741 is a non-metallic mounting block engineered to give installers a solid, weather-resistant base for mounting electrical boxes and fixtures directly to lap siding. Measuring 5" x 7", this surface-mount block is sized specifically for use with 1/2" lap siding, creating a flat, level surface behind the siding line so boxes stay properly aligned with the siding profile instead of sitting proud or crooked. Molded from durable, non-metallic plastic in a White finish, the MB5741 resists the rust and corrosion that can plague metal mounting hardware in exterior environments, while its White color coordinates cleanly with common siding tones. It is a practical, purpose-built solution for both new construction and renovation projects where exterior electrical devices need a dependable mounting point on 1/2" lap siding.

Key Features

• Trade Size: 5" x 7" mounting block sized to accommodate standard electrical box and fixture installations on exterior siding.
• Durable Construction: Non-metallic, plastic construction resists rust and corrosion, providing long-lasting performance in exterior siding applications.
• Siding Compatibility: Purpose-built for 1/2" lap siding, ensuring a proper fit and a level mounting surface behind the siding line.
• Surface Mount Design: Mounts directly to the wall surface beneath the siding, simplifying installation of exterior electrical boxes and fixtures.
• Material Benefit: Lightweight, non-conductive plastic construction stays stable and rust-free where metal mounting blocks would corrode over time.
• Finish: White color coordinates with common siding tones for a clean, finished exterior appearance.

Technical Specifications

• Refer to manufacturer documentation for complete specifications.

Typical Applications

• Exterior Siding Electrical Box Installations
• Mounting Lights, Receptacles, and Fixtures to Lap Siding
• New Construction Siding Projects
• Renovation and Retrofit Siding Installations
• Weatherproof Backing for Exterior Electrical Devices

Why Arlington Industries?

Arlington Industries builds electrical mounting products engineered to solve real installation challenges, and the MB5741 non-metallic mounting block is no exception. Its plastic, non-metallic construction and siding-specific 5" x 7" sizing for 1/2" lap siding give installers a reliable way to mount electrical boxes flush and level against exterior siding, without the corrosion concerns of metal alternatives. For professionals and homeowners seeking a purpose-built, corrosion-resistant mounting solution for lap siding, the Arlington Industries MB5741 delivers dependable, practical performance for exterior electrical installations.