S-98688A146 31 mm ID x 56 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Superior load distribution with 56mm outer diameter, preventing surface damage and joint loosening
• Precision M30 screw compatibility with 31mm inner diameter ensuring perfect fit and vibration resistance
• Exceptional mechanical strength with Rockwell C38 hardness for heavy-duty applications
• International standard compliance meeting both DIN 125 and ISO 7089 specifications
• Environmental regulation adherence with RoHS 3 and REACH compliance for global supply chain integration
• Optimal thickness range (3.7-4.3mm) providing consistent performance under varying compression loads

Professional Applications & Engineering Value

This heavy-duty flat washer delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The zinc plated steel construction creates a sacrificial barrier that significantly outperforms uncoated alternatives in moist or chemically aggressive environments. With precise metric dimensions (31mm ID × 56mm OD) engineered specifically for M30 screw applications, it eliminates bolt head embedding and distributes clamping forces evenly across connected surfaces. The Rockwell C38 hardness rating ensures the washer maintains its structural integrity under extreme pressure, making it ideal for heavy machinery assembly, structural steel connections, and industrial equipment where DIN 125 and ISO 7089 standards are required. The combination of material properties and dimensional precision addresses common failure points in bolted joints, reducing maintenance frequency and improving operational safety.

Specification Summary & Compliance

This flat washer features precision metric dimensions with 31mm inner diameter and 56mm outer diameter, maintaining thickness between 3.7-4.3mm for consistent performance. Manufactured to DIN 125 and ISO 7089 standards, it ensures dimensional accuracy and interchangeability. The zinc plated steel construction provides both corrosion resistance and Rockwell C38 hardness for mechanical durability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and global market acceptance.