S-91190A550 8.5 mm ID x 12.7 mm OD DIN 7980 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications, ensuring long-term assembly integrity
• Black-oxide steel construction provides excellent corrosion resistance and durability in demanding industrial environments
• Rockwell C44 hardness rating delivers exceptional strength and wear resistance for extended service life
• Precision M8 sizing (8.5mm ID, 12.7mm OD) ensures perfect fit and reliable performance with standard metric fasteners
• DIN 7980 compliance guarantees consistent quality and dimensional accuracy for European engineering standards
• RoHS 3 and REACH compliance meets strict environmental regulations for safe use across global markets
• Standard split lock design offers easy installation and reliable spring action for consistent locking force

Professional Applications & Engineering Value

These M8 metric split lock washers deliver critical vibration-resistant performance in industrial applications where fastener security is paramount. The black-oxide steel material provides superior corrosion protection while maintaining the necessary spring tension for effective locking action. Engineered to DIN 7980 standards, these washers solve common industrial challenges of bolt loosening in machinery, automotive assemblies, and heavy equipment. The precise 8.5mm internal diameter and 12.7mm outer diameter ensure optimal contact surface distribution, while the Rockwell C44 hardness maintains structural integrity under repeated stress cycles. Ideal for vibration-resistant applications in manufacturing plants, transportation equipment, and industrial machinery where reliable fastener performance cannot be compromised.

Specification Summary & Compliance

This M8 split lock washer features precise dimensional specifications with 8.5mm internal diameter, 12.7mm outer diameter, and 1.9-2.1mm thickness. Manufactured to DIN 7980 standards for dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications. The standard split lock design provides reliable spring action for effective vibration resistance in metric fastener assemblies.