S-91235A314 4.2 mm ID x 8 mm OD Heavy-Vibration-Resistant Spring Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance due to the spring lock design, preventing fastener loosening in dynamic applications
• Excellent corrosion resistance provided by 17-7 PH Stainless Steel material, ideal for harsh industrial environments
• High mechanical strength and durability with Rockwell C38 hardness, ensuring long service life under load
• Precision fit for M4 screws with 4.2mm ID and 8mm OD dimensions, enabling easy installation and secure fastening
• Reliable performance in compact spaces thanks to the 0.8mm overall height and 0.4mm thickness design
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries
• Maintained clamping force through the spring action, reducing maintenance needs in vibrating equipment

Professional Applications & Engineering Value

This spring lock washer is engineered to solve critical vibration-induced loosening problems in industrial assemblies. The 17-7 PH Stainless Steel construction provides exceptional corrosion resistance, making it suitable for demanding environments like automotive components, electrical enclosures, and outdoor machinery where moisture and chemicals are present. The precise 4.2mm ID ensures perfect compatibility with M4 screws, while the spring lock mechanism maintains constant tension to prevent back-off in vibrating systems. This combination of material properties and mechanical design delivers reliable performance in applications ranging from precision instruments to heavy equipment, reducing downtime and maintenance costs associated with fastener failure.

Specification Summary & Compliance

This washer features precision dimensions with 4.2mm inner diameter, 8mm outer diameter, 0.4mm thickness, and 0.8mm overall height specifically designed for M4 screw applications. Manufactured from 17-7 PH Stainless Steel with Rockwell C38 hardness for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental standards for industrial components.