S-91518A210 M8 x 25 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 construction and passivated finish, ensuring longevity in harsh environments
• Reliable reverse-thread security through left-hand metric threading, ideal for applications requiring counter-clockwise tightening to prevent loosening
• High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness, providing dependable load-bearing capacity
• Precise flush mounting enabled by the standard flat head profile and 90° countersink angle for seamless, professional installations
• Efficient installation and removal using the 5mm hex drive, allowing for high torque application with common tools
• Consistent thread engagement due to Class 6g thread fit and coarse M8x1.25mm pitch, reducing cross-threading risks
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, supporting sustainable and safe manufacturing practices

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these M8 left-hand thread flat head screws address critical challenges in machinery and equipment where standard right-hand threads may loosen under specific rotational forces. The 18-8 stainless steel material, enhanced by a passivated finish, provides exceptional resistance to rust and chemical exposure, making these screws ideal for automotive, marine, and food processing applications. The fully threaded design and coarse thread pitch ensure maximum grip in soft materials or when vibration is a concern. With a hex drive for secure tool engagement, these components deliver reliable fastening in assembly lines, maintenance operations, and custom fabrication projects, reducing downtime and enhancing operational safety.

Specification Summary & Compliance

This metric flat head screw features M8x1.25mm coarse threads with a Class 6g thread fit, ensuring dimensional accuracy per ISO standards. The 25mm length and standard flat head profile with a 90° countersink angle facilitate precise, flush installations. Manufactured from 18-8 stainless steel with a passivated finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial components.