METALCITI Boston Aluminium Z-Bar French Cleat Hanging Rail 300 mm (Pre-Drilled / 3 Holes – 40 kg)

The Boston 300 mm (30 cm / 11.8″) aluminium French cleat Z-Bar hanging rail is a heavy-duty mounting profile designed for securing small-to-medium picture frames, mirrors, wall shelves, and panels. Extruded from high-grade aluminium alloy, this pre-drilled 300 mm rail features 3 factory-punched 6 mm fixing holes for rapid, hassle-free setup. Its precision Z-shaped interlocking profile holds objects securely with a minimal 6.3 mm wall stand-off, delivering an invisible, perfectly level, and rock-solid mounting solution for domestic and commercial projects. Rails are sold individually (not in pairs) to allow custom modular configurations.

Key System Benefits

Heavy-Duty 40 kg Weight Rating — High-grade extruded aluminium construction supports up to 40 kg per rail when anchored firmly into timber wall studs, solid masonry, or suitable drywall fixings.

Factory Pre-Drilled (3 Holes) — Features 3 pre-punched 6 mm fixing holes spaced along the 300 mm length, eliminating the need to drill through tough metal on site.

Slim 6.3 mm Depth Projection — Low-profile interlocking design keeps frames and mirrors exceptionally close to the wall for a sleek, floating presentation.

Versatile Installation Configurations — Can be installed as rail-on-rail, clip-on-rail, or clip-on-clip setups to accommodate unique frame dimensions and structural stud alignments.

Technical Specifications & Downloads

Profile Series: Boston Z-Bar Series
Rail Length: 300 mm (30 cm / 11.8″ — easily trimmed using a standard hacksaw)
Height × Depth: 34.9 mm (H) × 6.3 mm (D)
Lift-Off Clearance (Interlock): Requires 9.5 mm vertical clearance to engage/disengage
Maximum Weight Capacity: 40 kg (Subject to wall substrate and anchor rating)
Profile Hole Type: Pre-Drilled (3 × 6 mm fixing holes)
Material & Finish: High-grade extruded aluminium
Installation Manual: Download Z-Bar Hanger Instructions (PDF)
Quantity: 1 single rail

Flexible Mounting & System Compatibility

The Boston Z-Bar system provides exceptional versatility across various wall surfaces, including drywall, plaster, and timber studs. Because the interlocking cleat profile is uniform across the Boston series, you can freely pair 300 mm rails together or combine a 300 mm rail with 50 mm Boston clips or longer continuous wall rails.

Installation Configurations:

Rail-on-Rail: Pair two 300 mm rails (one on the wall, one on the item) for medium picture frames, small cabinets, or decorative panels.
Rail-on-Rail: Mount two 50 mm Boston rails to the back of a frame and interlock them onto a continuous 300 mm wall rail.
Split Anchor Fit: Mount a longer Boston wall rail (e.g. 1200 mm) on the wall and pair it with two 300 mm rail segments across the back of your frame.

Installation & Structural Load Safety

1. Mark your fixing positions through the 3 factory 6 mm holes using a spirit level along your wall or timber studs.
2. Secure the wall rail with the open Z-channel facing UP and OUT.
3. Secure the matching rail or clips to the rear top edge of your item with the open Z-channel facing DOWN and IN.
4. Lift your item above the wall rail and lower it into place until the cleats engage. Ensure you allow at least 9.5 mm vertical clearance above the rail to slide the interlocking channels together.

Load Capacity Safety Note: The stated 40 kg weight capacity applies to the structural limit of the aluminium rail itself. Fixings and wall substrates (screws, plugs, plasterboard) typically fail before the rail. Always ensure your fixings and wall structure are rated to support the total load.

What’s Included in the Box

1 × Boston Aluminium Z-Bar French Cleat Hanging Rail 300 mm (Pre-Drilled with 3 × 6 mm Holes – 40 kg Rating)

Note: Rails are sold individually (not in pairs) to allow custom modular configurations. Fixing screws and wall plugs are sold separately.

Illustration only

Only the items listed above are included. Below images to show how the system can be used.