S-91390A105 M3 x 12 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Rockwell C45 hardness for reliable, long-term fastening in demanding applications
• Secure, non-slip engagement thanks to the cup tip design that bites into surfaces to prevent component movement
• Precise and reliable fit ensured by the Class 5g6g thread tolerance, reducing the risk of cross-threading and assembly issues
• High durability and strength from the alloy steel construction, resisting wear and deformation under load
• Easy installation in confined spaces with the headless and hex drive design, allowing for flush mounting
• Broad industrial compatibility with a coarse M3 x 0.5 mm thread, making it suitable for a wide range of standard components
• Compliance with major global standards including DIN 916 and ISO 4029, ensuring quality and interchangeability

Professional Applications & Engineering Value

This alloy steel set screw is engineered to solve critical challenges in industrial assembly and precision machinery. The M3 metric thread with a 0.5 mm coarse pitch and Class 5g6g fit provides a robust, vibration-resistant connection that maintains clamp load in dynamic environments. The headless, hex drive style is ideal for applications where a protruding head is not feasible, such as in shaft collars, gears, and pulleys. The cup tip concentrates pressure on a small contact area, creating a strong bite that prevents slippage and axial movement, which is crucial for securing components onto shafts or within bores. Manufactured from high-grade alloy steel and heat-treated to a Rockwell C45 hardness, it offers excellent resistance to shear and tensile stresses, making it a reliable choice for automotive, aerospace, and heavy machinery applications where failure is not an option.

Specification Summary & Compliance

This set screw features an M3 x 0.5 mm coarse, right-hand thread with a precision Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy and consistent performance. It is manufactured to meet the specifications of DIN 916 and ISO 4029. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for use in various industrial and international markets.