S-98687A139 13 mm ID x 20 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior Load Distribution - The precise 13mm ID and 20mm OD dimensions ensure even pressure distribution, preventing surface damage and extending equipment lifespan.
• Enhanced Durability - Manufactured from high-grade steel with Rockwell B76 hardness for excellent resistance to wear and deformation under heavy loads.
• Reliable Fastening Performance - Specifically designed for M12 screws, this washer maintains secure connections in high-vibration industrial environments.
• Standardized Precision - DIN 433 compliance guarantees consistent quality and interchangeability across metric fastener systems.
• Optimal Thickness Control - 2.3-2.7mm thickness range provides the perfect balance between spacing requirements and structural integrity.
• Environmental Compliance - Meets RoHS 3 and REACH regulations, ensuring safe use in sensitive applications without hazardous substances.
• Corrosion Resistance - Steel construction offers inherent protection against rust, suitable for various industrial conditions.

Professional Applications & Engineering Value

This M12 metric flat washer delivers critical engineering value in industrial applications where vibration resistance and load distribution are paramount. The steel construction with Rockwell B76 hardness ensures the washer maintains its structural integrity under constant stress, preventing loosening in machinery, automotive assemblies, and construction equipment. The DIN 433 standard compliance guarantees precise 13mm ID and 20mm OD dimensions that perfectly match M12 fasteners, eliminating play and ensuring consistent clamping force. This flat washer solves common engineering challenges by providing reliable surface protection against galling and deformation, while the controlled 2.3-2.7mm thickness offers optimal spacing without compromising the fastener's tension capabilities. Ideal for assembly lines requiring standardized metric washers that meet strict European engineering specifications.

Specification Summary & Compliance

This metric flat washer features precise dimensional specifications with 13mm internal diameter, 20mm external diameter, and 2.3-2.7mm thickness range. Manufactured to DIN 433 standards for consistent quality and performance in metric fastener systems. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance. Designed specifically for M12 screw size applications with Rockwell B76 hardness rating for durable performance in industrial settings.