S-91390A554 M8 x 70 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with a cup point design that bites into materials for secure, non-slip fastening in high-vibration environments.
• Exceptional durability and wear resistance provided by alloy steel construction and a Rockwell C45 hardness, ensuring a long service life under heavy loads.
• Reliable and precise coarse threading (M8 x 1.25mm) with a Class 5g6g fit for quick installation and consistent performance in a wide range of materials.
• Streamlined installation and removal using a standard 4mm hex drive, allowing for high torque application in confined, headless designs.
• Guaranteed quality and interchangeability through compliance with DIN 916 and ISO 4029 standards, ensuring dimensional accuracy and global compatibility.
• Safe for use in regulated industries as it is fully compliant with RoHS 3 and REACH environmental regulations.
• Versatile right-hand thread direction for standard assembly processes, making it a reliable choice for common industrial applications.

Professional Applications & Engineering Value

This M8 set screw is engineered to solve critical challenges in industrial assembly, where vibration and rotational forces can cause standard fasteners to loosen. The alloy steel material and Rockwell C45 hardness provide the necessary strength to withstand high stress without deforming. Its headless and cup point design is ideal for securing collars, gears, and pulleys onto shafts, as the point creates a permanent indentation that resists backlash. The coarse metric thread (M8 x 1.25mm) ensures a strong grip in both soft and hard materials, while the 4mm hex drive allows for easy installation in tight spaces. Complying with DIN 916/ISO 4029, this screw delivers reliable performance in machinery, automotive, and automation systems, preventing costly downtime and maintenance.

Specification Summary & Compliance

This set screw features an M8 x 1.25mm coarse thread with a Class 5g6g thread fit per ISO standards, ensuring precise dimensional tolerances for reliable engagement. 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 from hazardous substances and safe for use in various industrial and international markets.