S-90187A113 M8 x 3 3/8" ISO 4017, DIN 933 Tight-Spot Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Exceptional load-bearing capacity with Class 8.8 strength rating (110,000 psi tensile, 69,600 psi shear) for heavy-duty applications
• Reliable vibration resistance through expanding sleeve locking mechanism that prevents loosening under dynamic loads
• Optimized installation efficiency with external hex drive and coarse thread design for faster assembly in various materials
• Consistent performance assurance with full ISO 4017/DIN 933 compliance and precise Class 6g thread fit
• Enhanced durability with Rockwell C22 hardness that maintains fastener integrity under repeated stress
• Versatile thickness accommodation with 1 5/8"-2 3/8" material range and fully threaded design for flexible application

Professional Applications & Engineering Value

Engineered for demanding industrial scenarios, these M8 hex head screws deliver critical performance where vibration resistance and structural integrity are paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, machinery frames, and structural steel connections. The expanding sleeve locking mechanism solves the persistent challenge of fastener loosening in high-vibration environments like heavy machinery, conveyor systems, and automotive assemblies. With coarse thread design and external hex drive, installation becomes significantly more efficient in both metal and composite materials, reducing assembly time while maintaining the Class 8.8 tensile strength required for critical structural connections. The fully threaded configuration ensures maximum grip length across the specified material thickness range.

Specification Summary & Compliance

Manufactured to precise ISO 4017/DIN 933 standards with Class 6g thread fit tolerance for consistent engagement. The fastener meets Class 8.8 strength classification with verified mechanical properties including 110,000 psi tensile strength and Rockwell C22 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Designed for use with 9/16" drill bit size and accommodates material thickness from 1 5/8" to 2 3/8".