Keep-Nut Inserts Parts Kit

Create strong, permanent threads in stone panels without adhesives using professional stainless steel press-in threaded inserts.

Looking for a Reliable Threaded Insert for Stone Panels?

The Keep-Nut Inserts Parts Kit provides a fast, secure solution for creating permanent threaded attachment points in granite, marble, and other natural stone panels. Manufactured from corrosion-resistant stainless steel, each Keep-Nut insert features a threaded bushing, toothed spring washers (crowns), and a retaining ring that work together to create a powerful mechanical anchor without the need for adhesives or specialty undercut drilling.

Installation is quick and straightforward. Simply drill a standard cylindrical hole, press the insert into place, and the unique crown system mechanically locks into the stone when subjected to tensile load. The result is a strong, concealed fastening solution that is ideal for architectural stone, furniture, countertops, wall systems, and countless fabrication applications.

Available in multiple lengths and flange configurations, Keep-Nut inserts accommodate a variety of panel thicknesses and project requirements.

What Fabricators Use Keep-Nut Inserts For

• Ventilated stone facades
• Wall cladding systems
• Stone furniture fabrication
• Kitchen and countertop components
• Bathroom and sanitary installations
• Architectural stone panels
• Decorative stone applications
• Hidden mechanical fastening systems

Advantages

• Creates permanent internal threads in stone panels
• Requires only a standard cylindrical drilled hole
• No undercut drilling required
• No resins or adhesives needed
• Quick press-in installation
• Hidden fastening with no exposed hardware
• Mechanical crown system permanently locks insert into the stone
• Internal thread stop helps prevent over-length bolt extraction
• Manufactured from corrosion-resistant stainless steel

Specifications

• Material: Stainless steel
• Mechanical press-in threaded insert
• Includes threaded bushing, toothed spring washers, and retaining ring
• Available in multiple lengths
• Available with or without flange
• Designed for granite, marble, and other stone materials

Why Choose Keep-Nut Inserts?

Traditional stone fastening systems often require adhesives, undercut drilling, or complicated installation procedures. Keep-Nut simplifies the process by utilizing a mechanical anchoring system that installs into a standard drilled hole using simple press-in installation.

As tensile force is applied, the specially engineered spring crowns expand radially against the hole walls, creating a secure mechanical lock that distributes the load throughout the surrounding stone. This provides outstanding holding strength while maintaining a completely concealed attachment point.

Whether you're fabricating architectural facades, stone furniture, decorative panels, or custom installations, Keep-Nut Inserts deliver a fast, reliable, and professional fastening solution that saves time while providing exceptional long-term performance.

BB Industries has you covered!

Frequently Asked Questions

What materials can Keep-Nut Inserts be installed in?

They are designed for granite, marble, and many other natural stone materials.

Do Keep-Nut Inserts require undercut drilling?

No. Installation requires only a standard cylindrical drilled hole, allowing the use of conventional drilling tools.

Are adhesives or epoxy required?

No. Keep-Nut Inserts use a mechanical anchoring system and do not require resins, epoxy, or other adhesives.

How does the insert stay locked in the stone?

When tensile load is applied, the toothed spring crowns expand radially against the hole wall, creating a permanent mechanical lock within the stone.

What prevents the insert from being pulled out by an overly long screw?

The internal thread does not extend completely through the insert, creating a thread stop that helps prevent extraction caused by using an excessively long fastener.