S-91190A530 5.4 mm ID x 8.8 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
• Black-oxide steel construction provides excellent corrosion resistance and durability
• Precision M5 sizing (5.4mm ID, 8.8mm OD) ensures perfect fit for standard metric screws
• Rockwell C44 hardness rating maintains structural integrity under heavy loads
• DIN 7980 compliance guarantees consistent quality and dimensional accuracy
• RoHS 3 and REACH compliance meets international environmental and safety standards
• 1.5-1.7mm thickness provides optimal spring tension while minimizing assembly height

Professional Applications & Engineering Value

This M5 metric split lock washer delivers exceptional performance in demanding industrial environments where vibration-induced loosening compromises assembly integrity. The black-oxide steel material provides superior corrosion protection while maintaining the necessary spring tension to keep M5 fasteners securely locked. Engineered to DIN 7980 standards, this standard type split lock washer features precise dimensions (5.4mm ID, 8.8mm OD) that ensure reliable performance in automotive, machinery, and equipment manufacturing applications. The split design creates constant spring force against both the bearing surface and fastener head, effectively resisting rotational forces and maintaining clamp load in vibrating systems.

Specification Summary & Compliance

This split lock washer features precise metric dimensions with 5.4mm internal diameter, 8.8mm external diameter, and 1.5-1.7mm thickness range. Manufactured from black-oxide steel with Rockwell C44 hardness, it conforms to DIN 7980 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety standards are met for industrial applications.