S-90251A307 M3 x 8 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure fastening in temperatures from -50° to 250°F
• Superior corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
• Precise thread engagement with Class 6g fit and coarse thread spacing for quick installation and reliable holding power
• High-strength performance with Rockwell B80 hardness rating for durable, heavy-duty applications
• Secure internal drive with 1.5mm hex socket that prevents stripping and provides consistent torque transmission
• Effective point contact through cup point design that creates positive seating and prevents component slippage
• Industry-standard compliance meeting DIN 916/ISO 4029 specifications for guaranteed interchangeability and quality

Professional Applications & Engineering Value

This M3 set screw with nylon patch locking provides critical vibration resistance in demanding industrial applications where loosening under dynamic loads is a primary concern. The 18-8 stainless steel construction offers excellent corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements. The cup point design bites into mating surfaces, creating secure mechanical locking that prevents rotational movement in pulleys, gears, and collars. With its 1.5mm hex drive and Class 6g thread fit, this headless set screw ensures precise installation in confined spaces while maintaining the flush profile required for rotating assemblies. The combination of Rockwell B80 hardness and standardized metric thread specifications makes this fastener ideal for precision equipment, automotive components, and manufacturing machinery where reliability and dimensional accuracy are paramount.

Specification Summary & Compliance

This metric set screw features M3 x 0.5mm coarse thread spacing with Class 6g thread fit tolerance for precise dimensional accuracy. Manufactured to DIN 916/ISO 4029 standards, the fastener ensures consistent performance and interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use. The nylon patch thread locker maintains effectiveness across the specified temperature range of -50° to 250°F, providing reliable locking performance in varied operating conditions.