S-91390A635 M20 x 45 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with a cup point design that bites into surfaces for secure, long-term fastening in high-stress environments
• Exceptional durability and wear resistance thanks to Alloy Steel construction with a Rockwell C45 hardness rating
• Reliable and quick installation using a standard 10 mm hex drive, providing high torque capability without a protruding head
• Optimized for heavy-duty applications with coarse 2.5 mm pitch threads for faster assembly and reduced cross-threading risk
• Precise and consistent fit ensured by Class 5g6g thread tolerances for reliable performance in industrial assemblies
• Full compliance with international standards including DIN 916 and ISO 4029, guaranteeing interchangeability and quality
• Safe for use in regulated industries as it is RoHS 3 and REACH compliant, meeting strict environmental and safety directives

Professional Applications & Engineering Value

This M20 set screw is engineered to solve critical challenges in demanding mechanical systems where vibration resistance and secure positioning are paramount. The cup point concentrates force to create a permanent, non-slip grip on shafts, gears, and collars, preventing component shift under dynamic loads. Manufactured from alloy steel and heat-treated to Rockwell C45 hardness, it withstands high shear and tensile stresses without deforming. The coarse metric thread (2.5 mm pitch) ensures rapid installation and superior holding power in soft or hardened materials, while the headless hex drive design allows for flush mounting in space-constrained assemblies. Ideal for heavy machinery, automotive systems, and precision equipment, this screw delivers reliable performance where failure is not an option.

Specification Summary & Compliance

This set screw features M20x2.5 mm coarse threads with a Class 5g6g tolerance for precise fit and consistent performance. It is manufactured in compliance with DIN 916 and ISO 4029 standards, ensuring dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to the latest environmental and safety regulations for hazardous substances.