S-91390A226 M5 x 20 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Rockwell C45 hardness providing excellent resistance to wear and deformation in demanding applications.
• Precise and reliable fastening ensured by the Class 5g6g thread fit, offering consistent performance and reducing the risk of assembly issues.
• Optimized for high-torque installation using a standard 2.5 mm hex drive, allowing for secure tightening in confined spaces without a protruding head.
• Enhanced grip and minimal surface damage from the cup tip design, which bites securely into the contact surface for a non-slip connection.
• Robust and long-lasting performance due to the high-strength alloy steel construction, suitable for heavy-duty mechanical assemblies.
• Wide industrial compatibility with the M5 coarse thread (0.8 mm pitch), facilitating quick assembly and disassembly in various machinery and equipment.
• Guaranteed regulatory compliance, meeting DIN 916/ISO 4029 standards and being RoHS 3 and REACH compliant for safe use in global markets.

Professional Applications & Engineering Value

This M5 set screw is engineered to address common industrial challenges such as component slippage and vibrational loosening in high-stress environments. Manufactured from alloy steel and heat-treated to a Rockwell C45 hardness, it delivers exceptional tensile strength and fatigue resistance, making it ideal for securing gears, pulleys, and collars on rotating shafts. The headless design with a hex drive allows for flush mounting in tight spaces, while the coarse metric thread ensures rapid installation and reliable clamping force. Its cup tip provides a positive grip on the mating surface, preventing rotation and maintaining alignment in automotive, aerospace, and machinery assembly applications, thereby reducing maintenance downtime and enhancing operational safety.

Specification Summary & Compliance

This set screw features an M5 x 0.8 mm coarse thread with a Class 5g6g tolerance for precise thread engagement, a length of 20 mm, and a 2.5 mm hex drive. It is manufactured in accordance with DIN 916 and ISO 4029 standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for industrial use.