S-90491A102 8.5 mm ID x 14.8 mm OD DIN 127B Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents loosening under dynamic loads, maintaining joint integrity in high-stress environments.
• Enhanced corrosion protection from zinc-flake coating extends service life in harsh or outdoor industrial settings.
• High hardness (Rockwell C44) ensures the washer retains its shape and locking force, resisting deformation under pressure.
• Precise metric sizing (M8, 8.5mm ID, 14.8mm OD) guarantees a perfect fit with standard M8 fasteners, simplifying installation.
• DIN 127B compliance certifies consistent quality and performance, meeting rigorous German engineering standards.
• Reliable locking action from the standard split design provides secure fastening without needing additional components.
• Durable steel construction offers long-term reliability, reducing maintenance needs and replacement costs.

Professional Applications & Engineering Value

This M8 split lock washer is engineered to solve critical fastening challenges in demanding applications. Its zinc-flake coated steel construction provides excellent corrosion resistance, making it ideal for automotive assemblies, machinery, and outdoor equipment exposed to moisture or chemicals. The split lock design generates continuous spring tension against the nut and bearing surface, effectively countering vibration-induced loosening—a common failure point in dynamic systems. By complying with DIN 127B, it ensures dimensional accuracy and reliable performance in industrial washers applications, from heavy-duty manufacturing to precision engineering. This washer delivers consistent locking performance, reducing downtime and enhancing safety in vibration-resistant fastener systems.

Specification Summary & Compliance

This washer meets DIN 127B specifications, ensuring precise dimensions: Internal Diameter (ID) of 8.5 mm, Outer Diameter (OD) of 14.8 mm, and Thickness of 1.9–2.1 mm for M8 screw size. It is manufactured from zinc-flake coated steel with a hardness of Rockwell C44, providing consistent performance and durability. The product conforms to industry standards for metric lock washers, with compliance typically including RoHS and REACH environmental directives, supporting safe and sustainable use in global industrial applications.