S-91390A664 M12 x 35 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with extra fine 1.25mm thread pitch for secure, long-term positioning in dynamic applications
• Exceptional strength and durability from hardened alloy steel with Rockwell C45 hardness, resisting wear and deformation under high stress
• Reliable, secure fastening provided by the cup point tip which bites into the contact surface, preventing component slippage
• Easy installation in confined spaces with the headless, 6mm hex drive design, allowing for flush mounting and tool accessibility
• Guaranteed dimensional accuracy and interchangeability through compliance with DIN 916 / ISO 4029 standards and Class 5g6g thread fit
• Safe for use in regulated industries as it is fully RoHS 3 and REACH compliant, meeting strict environmental and safety directives
• Optimized for precision assembly with a right-hand metric thread (M12 x 1.25mm) and 35mm length for consistent performance

Professional Applications & Engineering Value

This M12 extra fine thread set screw is engineered to solve critical challenges in precision machinery and assembly. The alloy steel construction, hardened to Rockwell C45, provides the necessary core strength to resist loosening under constant vibration and torsional loads, a common failure point in motors, gearboxes, and rotating assemblies. The headless hex drive and cup point design are particularly valuable for applications requiring a flush surface and positive locking, such as in securing collars, pulleys, and gears onto shafts. By utilizing a Class 5g6g thread fit, this metric set screw ensures precise engagement and reliable clamping force, making it an indispensable industrial fastener for maintaining alignment and preventing costly downtime in automated systems.

Specification Summary & Compliance

This set screw is manufactured to DIN 916 / ISO 4029 specifications with a Class 5g6g thread fit, ensuring high dimensional accuracy for the M12 x 1.25mm extra fine thread. Key specifications include a 35mm length, 6mm hex drive, and a cup point tip. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and globally regulated industrial markets.