S-91280A018 M18 x 100 mm ISO 4014, DIN 931 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance with zinc plating protects against rust and environmental damage, extending service life in harsh conditions.
• High hardness rating (Rockwell C21) provides excellent wear resistance and durability, minimizing deformation under heavy loads.
• Precise metric threading (M18 x 2.5mm coarse pitch) offers easy installation and secure fastening with standard tools, saving time and labor costs.
• Partially threaded design allows for controlled clamping force and reduced thread galling, ideal for applications requiring specific grip lengths.
• Compliance with international standards (ISO 4014/DIN 931) guarantees dimensional accuracy and interchangeability, ensuring seamless integration into global projects.
• External hex drive head enables quick and firm tool engagement, facilitating efficient assembly and disassembly in tight spaces.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this M18 hex head screw combines Class 8.8 steel construction with a zinc-plated finish to address common challenges like corrosion, vibration loosening, and high tensile stress. The partially threaded metric design ensures optimal load distribution, preventing joint failure in machinery, structural frameworks, and automotive assemblies. With coarse thread spacing and right-hand threading, it simplifies installation in tough materials while maintaining Rockwell C21 hardness for long-term reliability. Ideal for heavy-duty applications, from construction to manufacturing, it delivers consistent performance under extreme conditions, reducing maintenance downtime and enhancing operational safety.

Specification Summary & Compliance

This fastener adheres to strict dimensional tolerances, including Thread Fit Class 6h and ISO 4014 specifications (equivalent to DIN 931), ensuring precision in metric coarse threading. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material integrity. The Class 8.8 strength grade and 110,000 psi tensile strength meet rigorous industrial standards for reliability and durability.