S-91390A140 M6 x 40 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point design that bites into materials for maximum resistance against loosening under vibration
• Exceptional durability provided by alloy steel construction with Rockwell C45 hardness for long-term performance in demanding applications
• Precise thread engagement with Class 5g6g tolerance ensuring reliable fit and consistent clamping force in assembly operations
• Easy installation and removal through 3 mm hex drive that accommodates standard tools while maintaining headless profile
• Industry-standard compatibility meeting DIN 916/ISO 4029 specifications for seamless integration into existing metric fastener systems
• Environmental compliance with RoHS 3 and REACH regulations for safe use across global industrial markets
• Optimized for coarse threading with M6 x 1 mm configuration enabling faster installation and reduced cross-threading risk

Professional Applications & Engineering Value

This alloy steel set screw delivers critical engineering solutions where vibration resistance and precise positioning are paramount. The cup point design creates concentrated pressure that digs into shaft materials, preventing rotational slip in pulleys, gears, and collars. With M6 coarse threading and Class 5g6g tolerance, installation becomes faster while maintaining secure fit in high-cycle applications. The 40 mm length provides sufficient engagement depth for structural integrity in machinery, automotive components, and industrial equipment. Manufactured to DIN 916/ISO 4029 standards, this headless screw offers reliable performance where flush mounting is essential, while the 3 mm hex drive ensures tool accessibility in confined spaces.

Specification Summary & Compliance

This metric set screw features M6 x 1 mm coarse right-hand threading with Class 5g6g thread fit per ISO metric standards, ensuring precise dimensional accuracy. The 40 mm length and cup point tip provide optimal engagement characteristics. Manufacturing complies with DIN 916/ISO 4029 specifications for dimensional and performance requirements. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substances.