S-91190A570 12.7 mm ID x 18 mm OD DIN 7980 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through the split lock design that maintains consistent tension under dynamic loads
• Enhanced corrosion protection with black-oxide steel construction for extended service life in harsh environments
• Precision dimensional accuracy with 12.7mm ID and 18mm OD ensuring perfect fit for M12 fasteners
• Exceptional mechanical strength with Rockwell C44 hardness providing reliable spring action and load distribution
• Industry-standard compliance meeting DIN 7980 specifications for consistent quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH adherence for global manufacturing applications
• Optimized thickness range (2.3-2.7mm) delivering ideal compression and locking force for secure assemblies

Professional Applications & Engineering Value

These M12 metric split lock washers provide critical vibration-resistant solutions for industrial applications where loosening under dynamic loads poses significant safety and maintenance concerns. The black-oxide steel construction offers superior corrosion resistance compared to plain steel alternatives, making them ideal for automotive assemblies, heavy machinery, and outdoor equipment exposed to environmental elements. The split lock washer design creates continuous spring tension that compensates for thermal expansion, material relaxation, and vibration-induced movement. Engineered to DIN 7980 standards, these washers deliver predictable performance in high-stress applications, preventing costly downtime and maintenance while ensuring long-term joint integrity in critical connections.

Specification Summary & Compliance

This standard split lock washer features precise dimensional specifications including 12.7mm inner diameter, 18mm outer diameter, and 2.3-2.7mm thickness range, designed specifically for M12 screw applications. Manufactured to DIN 7980 specifications with Rockwell C44 hardness ensuring proper spring characteristics and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental standards for industrial components while maintaining exceptional corrosion resistance through the black-oxide surface treatment.