S-91390A119 M5 x 8 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through the cup point design that bites into mating surfaces for secure, long-term fastening
• Exceptional strength and durability provided by alloy steel construction with a Rockwell C45 hardness rating
• Reliable and precise installation enabled by the hex drive (2.5mm) for high torque application without slippage
• Optimal thread engagement and load distribution from the Class 5g6g thread fit and coarse thread pitch (0.8mm)
• Guaranteed dimensional accuracy and interchangeability by conforming to DIN 916 / ISO 4029 international standards
• Environmental and regulatory compliance for global supply chains, meeting RoHS 3 and REACH directives
• Space-saving headless design ideal for applications where a flush or low-profile finish is required

Professional Applications & Engineering Value

This M5 x 0.8mm x 8mm alloy steel set screw is engineered to solve critical industrial fastening challenges, particularly in high-vibration environments. The cup point tip creates a permanent indentation in the shaft, preventing rotational loosening under dynamic loads, making it ideal for securing gears, pulleys, and collars on motor shafts. Manufactured from high-grade alloy steel and heat-treated to Rockwell C45 hardness, it maintains its clamping force and resists wear in demanding mechanical systems. The hex drive allows for secure tool engagement, enabling precise installation in confined spaces. As a headless screw conforming to DIN 916/ISO 4029, it provides a reliable, flush-mounting solution for machinery, automotive assemblies, and precision equipment where movement and stress are constant factors.

Specification Summary & Compliance

This metric set screw features an M5 thread size with a 0.8mm coarse pitch and 8mm length. Threads are manufactured to a Class 5g6g tolerance per ISO standards, ensuring precise fit and consistent performance. The product is manufactured in compliance with the DIN 916 / ISO 4029 specification for set screws with cup point. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in regulated markets and commitment to material safety.