S-91390A098 M3 x 4 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability thanks to alloy steel construction with Rockwell C45 hardness, ensuring long-term performance in demanding applications
• Secure and reliable fastening with the cup tip design that provides excellent grip and prevents component slippage
• Easy and precise installation using the 1.5 mm hex drive, allowing for high torque application in confined spaces due to the headless design
• Optimal thread engagement with coarse M3 x 0.5 mm right-hand threads and Class 5g6g fit, ensuring quick assembly and vibration resistance
• Full compliance with international standards including DIN 916 and ISO 4029, guaranteeing consistent quality and interchangeability
• Safe for sensitive applications as it meets RoHS 3 and REACH regulations, making it suitable for electronics and other regulated industries
• Versatile metric sizing with 4 mm length, providing a compact solution for precise positioning and adjustment in machinery

Professional Applications & Engineering Value

This M3 set screw is engineered to address critical fastening challenges in industrial settings where space is limited and reliability is paramount. The alloy steel material, hardened to Rockwell C45, offers superior resistance to wear and deformation under high stress, making it ideal for securing gears, pulleys, and shafts in machinery. The headless design with hex drive allows for flush mounting and easy access in tight assemblies, while the cup tip ensures a firm bite into the component surface, preventing rotation and loosening from vibrations. With its coarse metric thread and precise Class 5g6g fit, this screw facilitates quick installation and maintains clamping force in dynamic environments such as automotive, aerospace, and precision equipment manufacturing. Its compliance with DIN 916 and ISO 4029 standards assures engineers of consistent performance and compatibility in global supply chains.

Specification Summary & Compliance

This set screw adheres to precise dimensional tolerances, including a Class 5g6g thread fit per ISO standards, ensuring accurate engagement and reliability. It conforms to DIN 916 and ISO 4029 specifications for headless set screws, covering thread size M3 x 0.5 mm, length of 4 mm, and cup tip design. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in products without hazardous substances.