S-91310A544 M8 x 45 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with Class 10.9 strength grade and 150,000 psi tensile strength for reliable performance in high-stress applications
• Enhanced durability and wear resistance thanks to Rockwell C32 hardness and high-strength steel construction
• Optimized thread engagement with M8 coarse thread (1.25 mm pitch) ensuring faster assembly and reduced cross-threading risks
• Secure torque transmission through external hex drive design and 13 mm head width for stable tool engagement
• Precision manufacturing with Class 6g thread fit and partial threading for controlled clamping force distribution
• Global compliance assurance meeting ISO 4014/DIN 931 standards for consistent quality and interchangeability
• Environmentally responsible sourcing with RoHS 3 and REACH compliance for sustainable industrial operations

Professional Applications & Engineering Value

These M8 hex head screws deliver exceptional engineering value in demanding industrial environments where vibration resistance and structural integrity are critical. The Class 10.9 steel construction provides superior fatigue resistance, making them ideal for heavy machinery, automotive assemblies, and construction equipment. The coarse thread design (1.25 mm pitch) ensures reliable performance in materials prone to stripping or where rapid assembly is required. With partial threading and precise Class 6g tolerance, these fasteners offer controlled clamping force distribution, preventing joint loosening under dynamic loads. The external hex drive facilitates high-torque installation while the 45 mm length provides sufficient engagement depth for secure connections in structural applications.

Specification Summary & Compliance

This metric hex head screw features M8 x 1.25 mm coarse threading with Class 6g thread fit tolerance and 22 mm minimum thread length. Manufactured to ISO 4014/DIN 931 specifications, it ensures dimensional accuracy and interchangeability. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, confirming responsible material sourcing and manufacturing practices for global industrial applications.