Slotted selftapping insert with hex
Slotted self-tapping insert with internal hex drive – high-performance industrial B2B threaded fastening solution
Product description and technical specifications
The slotted self-tapping insert with internal hexagon, also known as a self-cutting threaded insert with hex socket, is a metal insert that forms its own internal thread (M4 to M10) in a pre-drilled hole without any prior tapping. This is achieved through a special external thread geometry combined with a cutting slot, resulting in a high-strength, wear-resistant internal thread suitable for demanding mechanical loads. The internal hex drive enables precise torque transfer and controlled installation, both manually and in automated assembly processes.
Description
Detailed technical characteristics
• Insert type: slotted self-tapping threaded insert with internal hexagon (ESK type), self-cutting design.
• Metric internal thread sizes: M4, M5, M6, M8, M10, compatible with ISO metric screws and bolts.
• Cutting technology: special external thread profile with cutting slot, no pre-tapping required.
• Available materials: hardened steel white zinc plated, brass and stainless steel AISI 303 for corrosion-resistant and demanding environments.
• Installation method: using an internal hex key (Allen key) for small batches or hex bit for precise axial installation in series production.
• Tolerances and standards: manufactured to industrial tolerances, ensuring reliable compatibility with ISO metric fastening systems.
• Base materials: non-hardened steel, exotic hardwood, cast iron, technical composites and semi-hard thermoplastics.
Technical advantages for industrial B2B applications
• No pre-tapping required, reducing machining steps, tooling costs and production time.
• Optimised torque transmission thanks to the internal hex drive, ensuring accurate installation.
• Durable, wear-resistant internal thread, suitable for repeated assembly and disassembly.
• Wide material compatibility, covering metal, wood and plastic applications.
• Stainless steel option AISI 303 available for corrosive or hygienic environments.
Typical industrial applications
• Machine and equipment manufacturing requiring strong, serviceable threaded connections.
• Metal constructions without additional tapping operations.
• High-end woodworking and interior construction with high mechanical load requirements.
• Thermoplastic and composite components, where direct thread cutting improves reliability.
• Industrial maintenance, repair and retrofit operations.
• Applications with recycling obligations, easy to unscrew after end-of-life.
Installation guidelines and best practices
- Pre-drilling: drill the hole to the recommended diameter for optimal cutting performance.
- Controlled insertion: install using an internal hex key or insertion tool 610/620 to maintain perfect alignment.
- Final check: ensure the insert is flush with the surface and ready to receive the ISO metric screw.
