S-97310A117 13 mm ID x 30 mm OD DIN 7349 Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Precise dimensional accuracy with 13mm ID and 30mm OD ensuring perfect fit for M12 fasteners and preventing assembly issues
• Exceptional load distribution thanks to robust 5.4-6.6mm thickness, reducing surface pressure and component damage
• High mechanical strength with Rockwell B76 hardness, providing reliable performance under heavy-duty applications
• Guaranteed interchangeability through strict DIN 7349 compliance, ensuring consistent quality across batches
• Environmental responsibility with full RoHS 3 and REACH compliance, meeting global regulatory standards
• Versatile industrial suitability for machinery, automotive, and construction applications requiring durable metric fastening solutions

Professional Applications & Engineering Value

This M12 flat washer delivers critical engineering value through its zinc-plated steel composition and DIN 7349 standardization. The electroplated zinc coating provides sacrificial protection against rust and chemical exposure, significantly prolonging component life in manufacturing equipment, automotive assemblies, and outdoor structures. Its optimized 30mm outer diameter and 5.4-6.6mm thickness create an ideal bearing surface that prevents bolt head embedding and distributes clamping forces evenly across joined materials. The Rockwell B76 hardness ensures the washer maintains its shape under high vibration and dynamic loads, solving common issues of fastener loosening and joint failure in heavy machinery and structural applications.

Specification Summary & Compliance

Manufactured to DIN 7349 dimensional standards with precise 13mm inner diameter and 30mm outer diameter tolerances. The zinc-plated steel construction provides consistent Rockwell B76 hardness throughout. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Designed specifically for M12 screw sizes with thickness ranging from 5.4-6.6mm to accommodate various application requirements.