S-91390A685 M20 x 25 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with high-strength alloy steel construction and Rockwell C45 hardness for maximum durability in demanding applications.
• Superior resistance to loosening thanks to the extra fine 1.5 mm thread pitch, providing a tighter and more secure fit.
• Reliable and precise installation enabled by the 10 mm hex drive, allowing for high torque application without head protrusion.
• Enhanced grip and minimal surface damage from the cup point tip, which bites securely into the contact surface for a permanent set.
• Guaranteed interchangeability and fit with Class 5g6g thread tolerance, ensuring consistent performance and easy assembly.
• Full compliance with international standards including DIN 916 and ISO 4029, assuring quality and reliability for global engineering projects.
• Safe for use in regulated industries as it is RoHS 3 and REACH compliant, meeting strict environmental and health safety standards.

Professional Applications & Engineering Value

This M20 set screw is engineered to solve critical fastening challenges in industrial machinery, automotive components, and precision equipment. Manufactured from alloy steel and heat-treated to a Rockwell C45 hardness, it resists shear forces and vibrational loosening, ensuring long-term joint integrity. The extra fine metric thread (1.5 mm pitch) offers a finer adjustment and superior clamping force compared to coarse threads, making it ideal for applications requiring precise axial positioning and high fatigue resistance. The cup point tip concentrates pressure to create a strong indentation, preventing slippage on shafts and collars. Combined with the headless, hex drive design, it provides a flush finish and high torque capability, essential for compact assemblies and heavy-duty set screw applications where space and reliability are paramount.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards with a M20x1.5 mm extra fine thread and Class 5g6g thread fit per ISO metric specifications, ensuring excellent dimensional accuracy and interchangeability. It is manufactured in compliance with DIN 916 / ISO 4029 standards, guaranteeing consistent quality and performance. The product is also certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free of hazardous substances and safe for use in various industrial and consumer applications.