S-91390A613 M8 x 18 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power through the cup point tip design that bites into mating surfaces for superior resistance to loosening under vibration
• Exceptional durability and wear resistance provided by Rockwell C45 hardness on high-strength alloy steel, ensuring a long service life in demanding applications
• Secure and high-torque installation enabled by the internal 4mm hex drive and headless design, ideal for confined spaces
• Reliable and precise coarse threading with a Class 5g6g thread fit for easy assembly and consistent clamping force
• Guaranteed dimensional and performance consistency through compliance with DIN 916 and ISO 4029 international standards
• Safe for use in regulated industries as it is fully RoHS 3 and REACH compliant, containing no hazardous substances
• Versatile coarse thread pitch (1.25mm) offers quick installation and robust performance in a wide range of materials

Professional Applications & Engineering Value

This M8 set screw is engineered to solve critical fastening challenges in industrial settings where reliable, headless fastening is paramount. The alloy steel construction, hardened to Rockwell C45, provides the necessary strength to prevent stripping and deformation under high stress. The cup point design is particularly valuable for permanently securing components like gears, pulleys, and collars onto shafts, as it creates a deep indentation that resists rotational forces and vibration-induced loosening. Its headless profile and 4mm hex drive make it an ideal choice for applications with limited clearance, such as in machinery, automotive assemblies, and precision equipment, ensuring a flush finish and secure hold without protruding parts. The coarse thread with a 1.25mm pitch ensures quick and easy installation while maintaining a strong grip, making it a dependable solution for maintenance and production lines.

Specification Summary & Compliance

This set screw features an M8 x 1.25mm coarse thread with a right-hand direction and a precise Class 5g6g thread fit per ISO metric standards, ensuring excellent dimensional accuracy and interchangeability. It is manufactured to meet the stringent specifications of DIN 916 and ISO 4029, guaranteeing consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted hazardous substances and safe for various industrial and export markets.