S-91390A173 M12 x 20 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with high-strength alloy steel construction and Rockwell C45 hardness for reliable, long-term fastening in demanding applications.
• Precise and secure installation enabled by the 6mm hex drive, allowing for high torque application without the risk of tool slippage.
• Optimized for quick assembly thanks to the coarse (1.75mm pitch) thread, which reduces installation time and prevents cross-threading.
• Flush and space-saving design with a headless and cup tip profile, ideal for applications where a protruding head is not permissible.
• Guaranteed interchangeability and fit through compliance with DIN 916 and ISO 4029 standards, ensuring consistent quality and performance.
• Confident global sourcing with full compliance to RoHS 3 and REACH regulations, making it suitable for use in regulated markets.
• Durable thread integrity provided by the Class 5g6g thread fit, offering excellent tolerance for reliable engagement and vibration resistance.

Professional Applications & Engineering Value

This M12 set screw is engineered to address critical challenges in industrial assembly, such as component slippage and loosening under vibration. Manufactured from alloy steel and heat-treated to a Rockwell C45 hardness, it provides exceptional shear and tensile strength, preventing failure in high-stress environments. The headless design with a hex drive allows for a flush finish, making it perfect for securing gears, pulleys, and collars on shafts where space is constrained. The coarse metric thread ensures rapid installation and superior resistance to vibrational loosening compared to fine threads. Its cup tip concentrates pressure for a firm grip, solving the common issue of secured parts shifting during operation. This screw delivers reliable holding power in machinery, automotive, and heavy equipment applications, ensuring operational safety and reducing maintenance downtime.

Specification Summary & Compliance

This set screw features an M12x1.75mm coarse thread with a Class 5g6g thread fit per ISO metric standards, ensuring precise dimensional accuracy and reliable performance. It is manufactured in compliance with the DIN 916 / ISO 4029 specification for hex socket set screws. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to stringent environmental and safety regulations for industrial components.