S-90251A157 M4 x 4 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure hold in high-stress applications
• Corrosion-resistant performance thanks to 18-8 stainless steel construction for long-term reliability
• Precise thread engagement with Class 6g fit ensuring consistent installation and load distribution
• Wide temperature tolerance from -50° to 250°F for stable performance in extreme environments
• Optimized torque transfer through 2mm hex drive design preventing tool slippage during installation
• Secure component positioning with cup point design that bites into mating surfaces
• Industry-standard compliance meeting DIN 916 specifications for guaranteed interchangeability

Professional Applications & Engineering Value

This M4 set screw with nylon patch locking technology addresses critical vibration-induced loosening in industrial machinery, automotive assemblies, and precision equipment. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining Rockwell B80 hardness for durability under mechanical stress. The coarse thread with 0.7mm pitch ensures rapid installation and reliable clamping force in metric fastener applications. The headless design with 2mm hex drive allows for flush mounting in confined spaces while the cup point creates positive seating on shafts and components. Engineered for permanent assemblies where disassembly isn't anticipated, this vibration resistant solution maintains integrity across thermal cycling and dynamic loading conditions.

Specification Summary & Compliance

Manufactured to DIN 916 specifications (equivalent to ISO 4029) with Class 6g thread tolerance for precision fit. The metric set screw features M4×0.7mm coarse thread with right-hand thread direction and 4mm length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial and consumer applications worldwide.