S-90251A321 M8 x 16 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker that maintains secure fastening even under extreme temperature fluctuations from -50° to 250°F
• Superior corrosion resistance provided by 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Precise installation control through the 4mm hex drive design that allows for accurate torque application and flush mounting in headless applications
• Reliable thread engagement with Class 6g thread fit ensuring consistent performance and easy installation in coarse thread applications
• Enhanced material durability with Rockwell B80 hardness providing excellent resistance to wear and deformation under load
• Optimized point contact through the cup tip design that creates secure fastening while minimizing surface damage to components
• Industry-standard compatibility manufactured to DIN 916/ISO 4029 specifications for reliable interchangeability in metric fastener systems

Professional Applications & Engineering Value

This M8 hex headless set screw delivers critical engineering solutions for applications where vibration resistance and secure positioning are paramount. The combination of 18-8 stainless steel material and nylon patch thread locker addresses common industrial challenges of component loosening in machinery, automotive assemblies, and precision equipment. The headless design with hex drive allows for flush installation in confined spaces while maintaining accessibility for adjustment or removal. Engineered with coarse metric threading (M8 x 1.25mm pitch), this fastener provides rapid installation and superior holding power in soft materials or where frequent disassembly isn't required. The cup tip configuration ensures positive seating without excessive penetration, making it ideal for securing gears, pulleys, and collars on shafts in manufacturing and automation systems.

Specification Summary & Compliance

This metric set screw features precise M8 x 1.25mm coarse threading with Class 6g thread fit tolerance according to ISO standards, ensuring consistent performance across applications. Manufactured to DIN 916 ISO 4029 specifications, the fastener maintains dimensional accuracy and mechanical properties required for industrial use. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substances. With a standardized 16mm length and right-hand thread direction, this set screw provides reliable integration into existing metric fastener systems while maintaining regulatory compliance for global industrial applications.