S-97760A621 M10 x 20 mm ASME B18.2.3.1M, ISO 898-1 Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced safety in reverse-torque applications with left-hand threading that prevents loosening under counter-clockwise rotation
• Superior load-bearing capacity thanks to Class 8.8 strength rating and 110,000 psi tensile strength for demanding mechanical assemblies
• Quick installation and high torque transmission with external hex drive and 17mm head width for secure tool engagement
• Reliable performance in high-vibration environments with coarse 1.5mm pitch threading that maintains grip under stress
• Long-term durability and corrosion resistance achieved through steel construction and Rockwell C21 hardness
• Precise fit and interchangeability ensured by Class 6g thread fit and full compliance with international standards
• Environmental and regulatory compliance meeting RoHS 3 and REACH requirements for global industrial use

Professional Applications & Engineering Value

This M10 left-hand hex head screw delivers critical engineering solutions where standard right-hand threads would fail. The Class 8.8 steel construction provides exceptional shear and tensile strength (110,000 psi) for heavy-duty mechanical assemblies, while the coarse 1.5mm pitch metric threading ensures rapid installation and superior resistance to vibrational loosening in machinery, conveyor systems, and rotating equipment. The external hex drive with 17mm head width allows for high-torque application without stripping, making it ideal for maintenance-intensive environments. Fully compliant with ISO 898-1 and ASME B18.2.3.1M specifications, this fastener offers reliable performance in automotive, manufacturing, and industrial equipment where reverse-thread applications prevent accidental disassembly.

Specification Summary & Compliance

This fully threaded metric screw features precise Class 6g thread fit tolerance with M10x1.5mm coarse spacing. Manufactured to ASME B18.2.3.1M and ISO 898-1 standards, it guarantees dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.