S-90377A175 0.406" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to Black-Oxide coated 18-8 Stainless Steel, ensuring long-term reliability in harsh environments.
• Exceptional load distribution with a large 3" Outer Diameter, protecting surfaces and preventing joint loosening under heavy loads.
• Precise fit for 3/8" screws with a 0.406" Inner Diameter, ensuring easy installation and secure fastening.
• Durable construction with a thickness range of 0.050" to 0.080", providing consistent performance and vibration resistance.
• Compliance with strict environmental regulations, being RoHS 3 and REACH compliant for safe, sustainable use in global markets.
• Ideal for industrial applications where a heavy-duty, corrosion-resistant flat washer is required for long-lasting assemblies.
• Manufactured to inch system standards, ensuring compatibility with a wide range of industrial equipment and fasteners.

Professional Applications & Engineering Value

This heavy-duty flat washer is engineered to solve critical challenges in demanding industrial environments. The Black-Oxide 18-8 Stainless Steel construction provides excellent corrosion resistance, making it ideal for outdoor machinery, marine applications, and chemical processing equipment where moisture and corrosive agents are prevalent. Its large 3" OD and robust design effectively distribute clamping force, preventing surface damage and maintaining bolt preload under high vibration and dynamic loads. With a precise 0.406" ID for 3/8" screws, it ensures a secure fit, reducing the risk of assembly errors. This washer is a reliable choice for structural assemblies, heavy equipment manufacturing, and infrastructure projects requiring durable, long-lasting industrial washers that withstand harsh conditions without compromising performance.

Specification Summary & Compliance

This flat washer features an Inner Diameter of 0.406", Outer Diameter of 3", and Thickness of 0.050-0.080", designed for use with 3/8" screws in inch-based systems. It is manufactured from Black-Oxide 18-8 Stainless Steel, providing inherent strength and corrosion protection. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting rigorous environmental and safety standards for industrial applications.