S-91280A249 M5 x 65 mm ISO 4014, DIN 931, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 8.8 strength rating and 110,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in various industrial environments
• Optimized thread engagement with Class 6h thread fit and coarse thread spacing for faster assembly and secure fastening
• Enhanced durability with Rockwell C21 hardness, maintaining structural integrity under repeated stress
• Industry-standard compatibility meeting ISO 4014 and DIN 931 specifications for seamless integration into existing systems
• Secure external hex drive providing excellent torque transmission and preventing tool slippage during installation
• Partial threading design allowing precise clamping force control and reduced thread damage in assembly applications

Professional Applications & Engineering Value

These M5 hex head screws deliver exceptional engineering value in industrial fastening applications where reliability and durability are paramount. The Class 8.8 steel construction provides the necessary tensile strength for structural assemblies, machinery frames, and equipment manufacturing, while the zinc plating offers crucial corrosion protection in environments exposed to moisture or chemicals. The coarse metric thread (M5 x 0.8mm) ensures rapid installation and superior resistance to vibration loosening, making these partially threaded screws ideal for applications requiring precise clamping force distribution. The external hex drive design allows for high-torque installation using standard tools, significantly reducing assembly time in production environments. These characteristics make them particularly valuable in automotive, manufacturing, and construction sectors where metric coarse thread fasteners are specified for their reliability and ease of maintenance.

Specification Summary & Compliance

This M5 hex head screw features precise dimensional accuracy with Class 6h thread fit tolerance and 65mm length with 16mm minimum thread length. Manufactured to ISO 4014 and DIN 931 standards with compliance to ISO 898 mechanical properties. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use across various industrial applications while maintaining consistent performance specifications.