S-91385A425 M8 x 12 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch thread locker that maintains secure fastening in temperatures from -50° to 250° F
• Superior corrosion protection from black-oxide coating on alloy steel, extending service life in demanding industrial environments
• High-strength performance with Rockwell C45 hardness rating for reliable load-bearing capacity and resistance to deformation
• Precise thread engagement with Class 5g6g thread fit ensuring consistent mating and reduced risk of cross-threading
• Easy installation in confined spaces using standard 4mm hex key drive with headless design
• Enhanced grip and alignment from cup tip design that provides positive seating on shaft surfaces
• Global compliance assurance meeting DIN 916/ISO 4029 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This M8 set screw delivers critical vibration resistance in machinery, automotive, and manufacturing applications where loosening under dynamic loads causes equipment failure. The black-oxide alloy steel construction provides corrosion resistance without sacrificing the Rockwell C45 hardness needed for high-strength fastening. The permanent nylon patch thread locker eliminates the need for secondary locking mechanisms while maintaining performance across extreme temperature ranges (-50° to 250° F). With Class 5g6g thread fit precision and coarse thread pitch design, installation torque is optimized for reliable clamping force in shaft collars, gears, and pulleys where the cup tip ensures maximum contact pressure.

Specification Summary & Compliance

Manufactured to Class 5g6g thread fit tolerance per metric standards with M8 x 1.25mm coarse thread specifications. Complies with DIN 916 / ISO 4029 manufacturing standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.