S-91280A030 M18 x 80 mm ISO 8765, DIN 960 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh industrial environments
• High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration, reducing failure risks
• Precise Class 6h thread fit provides smooth assembly and secure fastening with minimal play in metric applications
• Rockwell C21 hardness offers excellent durability and wear resistance for repeated use in demanding assemblies
• External hex drive design allows for easy installation and high torque application with standard tools
• Fine 1.5mm thread pitch delivers superior clamping force and vibration resistance compared to coarse thread alternatives
• Partial threading enables optimal grip length control for specific joint thicknesses while maintaining structural integrity

Professional Applications & Engineering Value

This M18 hex head screw with Class 8.8 strength rating and zinc plating addresses critical engineering challenges in heavy machinery, structural steelwork, and industrial equipment assembly. The fine metric threading (1.5mm pitch) provides enhanced vibration resistance in dynamic applications, while the Rockwell C21 hardened steel construction prevents stripping and deformation under high torque. Engineers specify this partially threaded fastener for precise clamp length control in multi-material assemblies, reducing stress concentration. Its external hex drive ensures compatibility with standard industrial tools, streamlining maintenance and installation processes in manufacturing and construction sectors where reliability and compliance with international standards are paramount.

Specification Summary & Compliance

This fastener maintains Class 6h thread fit tolerance per metric standards with M18 x 1.5mm fine threading and right-hand direction. Manufacturing conforms to ISO 8765 and DIN 960 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. With 80mm length and 42mm minimum thread length, it meets precise engineering requirements for industrial fastening applications.