S-90605A009 M4 x 20 mm DIN 912, ISO 4762 Left-Hand Threaded Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 12.9 rating and 170,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by black-oxide coating, extending service life in demanding industrial environments
• Precise thread engagement with Class 5g6g thread fit ensuring consistent, vibration-resistant connections
• Left-hand thread design offering specialized solutions for reverse-rotation applications and safety-critical assemblies
• Optimized drive efficiency through 3mm hex socket design allowing high torque application without cam-out
• Enhanced durability from Rockwell C37 hardness maintaining structural integrity under repeated stress
• Global compliance assurance meeting DIN 912/ISO 4762 standards for international project compatibility

Professional Applications & Engineering Value

This left-hand thread socket head cap screw delivers critical engineering solutions where reverse-threading prevents loosening in rotating machinery. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the Class 12.9 strength rating essential for high-vibration environments. The M4 x 0.7mm coarse thread configuration ensures rapid assembly in production lines, while the 3mm hex drive accommodates high torque requirements without stripping. These metric socket screws are particularly valuable in automotive, aerospace, and heavy machinery applications where left-hand threading serves as a safety feature against unintended disassembly. The combination of 170,000 psi tensile strength and precise Class 5g6g thread fit guarantees reliable performance in critical joint applications.

Specification Summary & Compliance

Manufactured to exact DIN 912/ISO 4762 specifications with Class 5g6g thread fit ensuring dimensional accuracy. The M4 x 0.7mm coarse thread maintains standard metric spacing, while the 20mm fully threaded design provides consistent engagement. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and regulatory acceptance for international industrial applications.