S-91390A110 M4 x 4 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Rockwell C45 hardness for reliable, vibration-resistant fastening in demanding applications
• Precise Class 5g6g thread fit ensures smooth installation and consistent clamping force without cross-threading risks
• Compact headless design allows for flush mounting in tight spaces where protruding fastener heads are not feasible
• Durable alloy steel construction provides high tensile strength and excellent resistance to wear and corrosion
• Hex drive compatibility with 2mm key enables secure, high-torque installation and easy removal for maintenance
• Cup point tip design creates positive biting action into shaft materials for superior anti-rotation performance
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This M4 set screw delivers critical engineering solutions for precision assembly challenges. The alloy steel composition combined with Rockwell C45 hardness provides exceptional resistance to vibrational loosening in machinery, automotive components, and power transmission systems. The headless design with hex drive enables space-optimized installations where conventional fasteners cannot be accommodated. The coarse 0.7mm pitch metric thread ensures rapid assembly while maintaining secure fastening integrity. Particularly valuable in industrial applications requiring repeated adjustments, the cup tip effectively embeds into shaft materials, preventing relative movement between components. Manufactured to DIN 916/ISO 4029 standards, these set screws guarantee dimensional consistency and reliable performance across production batches.

Specification Summary & Compliance

This metric set screw features precise M4 x 0.7mm coarse threading with Class 5g6g thread fit tolerance according to ISO standards. The 4mm length provides optimal engagement for shallow applications. Manufacturing conforms to DIN 916 ISO 4029 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental regulations for hazardous substances. The cup tip configuration and hex drive style maintain strict adherence to international engineering standards for set screw applications.