S-91144A117 31 mm ID x 56 mm OD DIN 6916, ISO 7416 Structural Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with hot-dipped galvanized steel coating, ensuring long-term reliability in harsh environments.
• Exceptional load distribution due to precise 56mm OD and 4.4-5.6mm thickness, minimizing surface damage and bolt loosening.
• High hardness rating of Rockwell C45 provides excellent resistance to wear and deformation under heavy loads.
• Perfect fit for M30 screws with 31mm ID, enabling secure fastening and reducing assembly time.
• Compliance with DIN 6916 and ISO 7416 standards guarantees dimensional accuracy and interchangeability in global projects.
• Environmental and safety compliance with RoHS 3 and REACH, making it suitable for regulated industries.
• Durable construction ideal for repeated use in heavy machinery and structural applications.

Professional Applications & Engineering Value

This M30 flat washer is engineered to address critical challenges in industrial applications where vibration, heavy loads, and corrosive conditions are common. The hot-dipped galvanized steel material offers a robust barrier against rust and chemical exposure, significantly extending service life in outdoor or humid environments like construction sites and marine equipment. Its adherence to DIN 6916 and ISO 7416 standards ensures precise metric dimensions and consistent performance, reducing the risk of joint failure. By providing reliable load distribution and corrosion resistance, this washer minimizes maintenance needs and enhances the safety of heavy-duty assemblies, from structural steelwork to machinery bases.

Specification Summary & Compliance

This flat washer features an inner diameter of 31mm, outer diameter of 56mm, and thickness range of 4.4-5.6mm, designed for M30 screw sizes with high dimensional accuracy per DIN 6916 and ISO 7416 standards. It meets Rockwell C45 hardness requirements for durability and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe and environmentally responsible use in various industrial sectors.