S-91390A614 M8 x 80 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power thanks to high-strength alloy steel construction with Rockwell C45 hardness for superior resistance to wear and deformation
• Secure and flush installation with a headless hex drive design that allows for unobtrusive fastening in tight spaces
• Reliable coarse threading (M8 x 1.25mm pitch) ensures quick assembly and reduced cross-threading risk in industrial applications
• Precise thread fit (Class 5g6g) delivers consistent engagement and vibration resistance for long-term joint integrity
• Enhanced grip with cup tip that bites into contact surfaces, preventing component slippage under dynamic loads
• Full compliance with DIN 916/ISO 4029 standards guarantees dimensional accuracy and interchangeability in metric assemblies
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, ensuring safety in regulated industries

Professional Applications & Engineering Value

This M8 set screw is engineered to address critical challenges in precision machinery, automotive, and heavy equipment sectors. Manufactured from alloy steel and hardened to Rockwell C45, it resists shear forces and fatigue in high-vibration environments. The headless hex drive and cup tip design allow for deep seating and firm contact, eliminating the need for protruding hardware while maintaining clamping force. Its coarse metric thread (1.25mm pitch) simplifies alignment and reduces installation time, making it ideal for securing gears, pulleys, and collars on rotating shafts. By meeting DIN 916 and ISO 4029 specifications, this screw ensures reliable performance in demanding industrial set screw applications, from conveyor systems to precision tooling.

Specification Summary & Compliance

This set screw features an M8 x 1.25mm coarse right-hand thread with a Class 5g6g thread fit per ISO standards, ensuring precise tolerances for secure fastening. It is manufactured in compliance with DIN 916 (identical to ISO 4029) for dimensional consistency. The product adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe use in global markets.