S-91100A355 13.2 mm ID x 29.5 mm OD DIN 7349-A Oversized Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution - The precise 29.5mm outer diameter provides a larger surface area to evenly distribute pressure, preventing surface damage and fastener loosening under heavy loads.
• Superior Corrosion Resistance - Zinc-plated steel construction offers excellent protection against rust and environmental degradation, extending the service life of your assembly.
li>Guaranteed Compatibility - Designed specifically for M12 fasteners with a 13.2mm inner diameter, ensuring a perfect fit and optimal performance with Class 8.8 bolts.
• High-Strength Reliability - Manufactured for use with Class 8.8 fasteners, this washer maintains integrity in demanding applications requiring high tensile strength.
• Standardized Precision - Conforms to the DIN 7349-A standard, guaranteeing consistent dimensions (5.4-6.6mm thickness) and reliable performance in metric systems.
• Environmental & Safety Compliance - Meets RoHS 3 and REACH regulations, ensuring the product is free from hazardous substances for safe use in global markets.
• Durable Industrial Performance - The robust steel material and zinc plating provide long-lasting durability, reducing maintenance needs and replacement costs.

Professional Applications & Engineering Value

This M12 flat washer is engineered to solve critical challenges in industrial applications where vibration, high loads, and corrosion are common. The zinc-plated steel material combats rust in harsh environments, from outdoor machinery to manufacturing equipment, while the DIN 7349-A standard ensures dimensional accuracy for seamless integration with Class 8.8 fasteners. Its primary engineering value lies in preventing joint failure by distributing clamp load effectively, which minimizes stress concentration on connected surfaces. This is vital for maintaining structural integrity in assemblies like heavy-duty frames, automotive components, and construction projects, offering a reliable, metric flat washer solution that enhances safety and reduces long-term operational downtime.

Specification Summary & Compliance

This washer features precise dimensions with an Inner Diameter (ID) of 13.2mm, Outer Diameter (OD) of 29.5mm, and a Thickness range of 5.4-6.6mm. It is manufactured to the DIN 7349-A standard, ensuring consistent thread and fit compatibility for M12 fasteners rated for Class 8.8 strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted hazardous substances for safe industrial use.