Sixlobe Flat Head Tapping Screw: Technical Overview and Applications - Dongguan CHEKSINE Metal Technology Co., Ltd.

It is a professional manufacturer of screws and nuts and other fastener products integrating R&D, production, processing and sales.

Specializing in the production of special precision screws and nuts of various standards such as Chinese standard GB, Japanese standard JIS, British BS, American ANSI and ISO.

At present, the smallest screw diameter that our company can produce is 0.4mm, the shortest is 0.4mm, and the longest is 300CM.

Introduction

The Sixlobe Flat Head Tapping Screw (also known as a Torx flat head self-tapping screw) is a specialized fastener designed for high-torque applications with superior drive stability. It features a six-point star-shaped recess (Torx drive) and a flat head profile, enabling precise installation and flush surface finishes. Below is a detailed breakdown of its characteristics, applications, and maintenance.

Technical Characteristics

The Sixlobe Flat Head Tapping Screw is engineered for performance and durability. Key specifications include:

Drive Type: Torx (Sixlobe) – Typically T10 to T30 sizes, offering 10-30% higher torque transmission compared to Phillips or slotted drives.
Head Style: Flat head (82° or 100° countersink angle) for seamless surface integration.
Thread Design: Self-tapping thread with a pitch of 0.5mm to 2.5mm, capable of forming threads in materials up to 500 MPa tensile strength.
Material: Carbon steel (Grade 8.8 or 10.9), stainless steel (A2/A4), or alloy steel with hardness ratings of 32-45 HRC.
Corrosion Resistance: Zinc plating (5-15µm), galvanization, or Dacromet coating for salt-spray resistance exceeding 500 hours (ASTM B117).
Size Range: M2 to M12 diameters, lengths from 6mm to 50mm.

Applications

These screws are widely used in industries requiring secure fastening with minimal cam-out risk:

Automotive: Engine components, trim panels, and electronics (torque values: 2-20 Nm).
Aerospace: Lightweight assemblies where vibration resistance is critical.
Electronics: PCB mounts and device housings (M2-M5 sizes).
Construction: Metal roofing and cladding (self-drilling variants available).
Medical Devices: Stainless steel (A4) screws for sterile environments.

Maintenance Guidelines

To ensure longevity:

Pre-Installation: Clean threads and apply lubricant (e.g., molybdenum disulfide) for high-torque applications.
Tool Selection: Use a calibrated Torx driver with ±2% torque accuracy to prevent stripping.
Corrosion Prevention: Reapply anti-corrosion coatings every 3-5 years in harsh environments.
Inspection: Check for thread wear or head deformation annually under load.

Conclusion

The Sixlobe Flat Head Tapping Screw combines precision engineering with robust performance, making it indispensable in high-stress applications. Proper selection and maintenance are key to maximizing its service life.