S-91385A207 M4 x 4 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch thread locker that maintains secure fastening in high-stress environments
• Superior corrosion protection through black-oxide coating on alloy steel, extending service life in demanding conditions
• Precise torque application enabled by 2mm hex drive design, preventing tool slippage and head damage during installation
• Reliable thread engagement with Class 5g6g thread fit and coarse 0.7mm pitch, ensuring quick assembly and reduced cross-threading risk
• Exceptional mechanical strength from Rockwell C45 hardness, providing high resistance to wear and deformation
• Wide temperature compatibility with locking performance maintained from -50° to 250°F for diverse industrial applications
• Optimized surface contact through cup tip design, creating secure clamping force without damaging mating surfaces

Professional Applications & Engineering Value

This M4 set screw delivers critical engineering solutions where permanent fastening under vibration and thermal stress is required. The black-oxide alloy steel construction provides essential corrosion resistance for automotive assemblies, industrial machinery, and precision equipment exposed to harsh environments. The nylon patch thread locker eliminates the need for secondary locking components, simplifying assembly while maintaining secure fastening through extreme temperature cycles from -50° to 250°F. With headless design and cup tip, it offers flush mounting and superior clamping in pulleys, gears, and collars where space constraints and surface protection are paramount. The coarse metric thread with Class 5g6g fit ensures rapid installation and reliable performance in high-volume manufacturing applications.

Specification Summary & Compliance

Manufactured to DIN 916/ISO 4029 standards with precise Class 5g6g thread fit tolerance for consistent performance. The M4 x 0.7mm coarse thread configuration with 4mm length delivers optimal engagement characteristics. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global markets. Rockwell C45 hardness specification guarantees mechanical integrity for demanding industrial applications.