S-91390A133 M6 x 20 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Rockwell C45 hardness alloy steel construction, resisting deformation under high stress
• Secure, flush installation thanks to the headless hex drive design, ideal for confined spaces and smooth surfaces
• Reliable coarse thread engagement for faster assembly and reduced risk of cross-threading in industrial applications
• Precise Class 5g6g thread fit ensures consistent performance and compatibility with standard metric components
• Enhanced grip and resistance to loosening from the cup tip, which bites into the contact surface
• Broad industry compliance with DIN 916 / ISO 4029 standards, guaranteeing dimensional accuracy and interchangeability
• Safe for regulated environments as it is fully RoHS 3 and REACH compliant, meeting strict environmental and safety directives

Professional Applications & Engineering Value

This M6 set screw is engineered to solve critical fastening challenges in demanding industrial settings. Manufactured from high-strength alloy steel and heat-treated to a Rockwell C45 hardness, it provides superior resistance to vibration and shear forces, preventing joint failure in machinery, automotive assemblies, and precision equipment. The headless design with a 3 mm hex drive allows for a completely flush finish, eliminating protrusions that could interfere with moving parts or aesthetic requirements. The coarse metric thread (M6 x 1 mm) and cup tip work in tandem to offer excellent grip and alignment, making it a reliable choice for securing gears, pulleys, and collars onto shafts. Its compliance with DIN 916 and ISO 4029 ensures it meets rigorous international specifications for dimensional tolerances and mechanical properties, providing engineers with a trusted, standardized component for their precision fastening needs.

Specification Summary & Compliance

This set screw features an M6 x 1 mm coarse thread with a Class 5g6g thread fit per ISO metric standards, ensuring precise dimensional accuracy for reliable assembly. It is manufactured to conform to the DIN 916 (ISO 4029) specification, which defines the requirements for hexagon socket set screws with cup point. The product is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, affirming it is free of restricted hazardous substances and safe for use in regulated markets.