S-91223A418 M4 x 8 mm 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term performance
• Space-saving ultra-low profile head provides a flush fit in applications with limited clearance
• Precise Class 6g thread fit ensures easy assembly and secure fastening with consistent performance
• Secure hex drive engagement with a 2.5mm drive size, minimizing stripping and allowing for high torque application
• Broad regulatory compliance with RoHS 3 and REACH standards, making them suitable for global industrial supply chains
• Versatile M4 x 0.7mm coarse thread design offers quick installation and robust holding power

Professional Applications & Engineering Value

Engineered for demanding applications, these M4 socket head cap screws provide a critical solution where corrosion resistance and high strength are paramount. The 316 stainless steel material excels in chemical processing, marine, and food-grade equipment, resisting pitting and crevice corrosion. The ultra-low profile head and compact 8mm length are specifically designed for tight spaces in machinery, precision instruments, and assembly jigs, preventing interference and allowing for sleek designs. The Class 6g thread and coarse M4 x 0.7mm pitch facilitate rapid installation and reduce the risk of cross-threading, enhancing assembly line efficiency. Combined with a reliable hex drive, these screws deliver the durability and precision required for high-vibration environments and critical structural fastening.

Specification Summary & Compliance

This socket head cap screw features an M4 diameter with a 0.7mm coarse metric thread and a precise Class 6g thread fit per ISO standards. The head diameter tolerance is maintained between -0.127mm to +0.127mm for consistent seating. The product is manufactured to be fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and suitable for use in regulated industrial markets.