S-91518A110 M3 x 6 mm Left-Hand-Thread Stainless Steel Hex-Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Secure left-hand threading prevents loosening in reverse-rotation machinery and specialized equipment
• Precise Class 6g thread fit guarantees consistent engagement and vibration resistance in metric assemblies
• Efficient hex drive installation with 2mm drive size provides superior torque transfer and prevents stripping
• Optimized flat head design with 90° countersink angle creates flush surfaces while maintaining structural integrity
• Full compliance assurance with RoHS 3 and REACH regulations for global industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial scenarios where standard right-hand threads would compromise safety, these M3 left-hand metric screws provide critical reverse-threading security in rotating assemblies, machinery guards, and specialized equipment. The 18-8 stainless steel construction combined with passivated surface treatment delivers exceptional resistance to chemical exposure and atmospheric corrosion, significantly extending service life in manufacturing, automotive, and marine environments. The fully threaded design with coarse 0.5mm pitch ensures maximum grip strength across the entire 6mm length, while the hex drive configuration enables high-torque installation without cam-out issues. These flat head screws solve critical fastening challenges where vibration resistance, material compatibility, and directional thread security are paramount.

Specification Summary & Compliance

Manufactured to precise metric standards with Class 6g thread tolerance ensuring consistent fit in M3 applications. The left-hand thread direction with 0.5mm coarse pitch provides specialized fastening solutions. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and global market acceptance. Mechanical properties include Rockwell B70 hardness and 70,000 psi tensile strength for demanding industrial applications.