S-91390A142 M8 x 12 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup tip design that bites into mating surfaces for maximum resistance to loosening under vibration and torque
• Exceptional strength and durability from alloy steel construction and Rockwell C45 hardness, ensuring reliable performance in demanding applications
• Precise and secure fit with Class 5g6g thread tolerance for consistent engagement and reduced risk of cross-threading
• Optimized for high-torque assembly using a standard 4 mm hex drive, providing a secure tool grip and preventing tool slippage
• Space-saving headless design allows for flush mounting in applications where protruding fastener heads are not feasible
• Quick and easy installation with coarse 1.25 mm pitch threads, reducing assembly time in industrial settings
• Guaranteed material safety and compliance, meeting RoHS 3 and REACH environmental regulations for use in various international markets

Professional Applications & Engineering Value

This M8 headless set screw is engineered to solve critical challenges in precision machinery, automotive components, and permanent industrial assemblies. The alloy steel material, hardened to Rockwell C45, provides the necessary high strength to resist shear forces and maintain clamp load in high-vibration environments. The cup point tip concentrates pressure on a small contact area, creating a deep indentation in the shaft or component for a non-slip, permanent lock. Combined with the coarse metric thread (M8 x 1.25mm) and Class 5g6g fit, it ensures rapid installation and a secure, precise fit that prevents loosening, making it an ideal set screw for collars, gears, and pulleys where reliability is paramount.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards with a Class 5g6g thread fit as per ISO metric thread specifications. It is manufactured to conform to DIN 916 and ISO 4029 standards, ensuring interchangeability and quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances for safe use in various industrial and engineering applications.