Undercut (Back-Bolt) Stone Cladding Anchor Kit

Undercut (Back-Bolt) Stone Cladding Anchor Kit

The undercut back-bolt stone cladding anchor kit provides a concealed fixing for granite, marble and engineered stone panels drilled with undercut holes. Each kit consists of an expansion back-bolt, an angle bracket and a pin, giving the facade a clean face with no visible hooks or exposed fixings.

Because the anchor threads into a blind undercut hole in the back of the stone, the front face stays completely clear, which is why the system is favoured on high-end marble and feature stone elevations. The SS304 or SS316 stainless steel construction and mill or brushed finish suit long-term exterior service on rainscreen and curtain wall stonework.

Key Features

• Material: SS304 / SS316 stainless steel for durable concealed fixing
• Specification: Undercut back-bolt anchor kit with angle bracket and pin
• Surface: Mill finish / brushed stainless surface
• Customization: Sizes and finishes prepared per project drawing
• Quality: 100% inspected before shipment; material test certificates available on request

Specifications

• Material options: SS304 or SS316 stainless steel
• Kit contents: Expansion back-bolt, angle bracket, pin
• Fixing type: Concealed undercut back-bolt fixing
• Finish: Mill finish / brushed

Installation & Usage

The back-bolt is inserted into the drilled undercut hole in the rear of the stone panel and expanded to lock in place, then the angle bracket is attached to the bolt and the pin locates the panel on the sub-frame. Panels are offered to the wall, aligned for joint width and level, and the fasteners tightened to the values in the project documentation. The stone face is protected during handling and cleaned once the course is fitted.

Quality Assurance

Every undercut anchor kit is 100% inspected before shipment for part completeness, thread condition and surface finish. Material test certificates are available on request to support project specifications.

Applications

• Concealed stone fixing systems
• Back-bolt undercut anchors for feature facades
• Granite and marble panel support
• Engineered stone and porcelain slab rainscreens

Customization & OEM

Custom sizes, materials and finishes are accepted per project drawing. Wholesale and OEM orders are welcome. Send your stone panel schedule to our team to request a quote.