S-91090A117 0.406" ID x 2" OD 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 fit with 0.406" inner diameter and 2" outer diameter, ensuring reliable alignment and load distribution for 3/8" screws.
• Consistent thickness control between 0.042" and 0.051", providing uniform pressure distribution and reducing the risk of fastener loosening.
• Wide application compatibility in inch-based systems, making it ideal for machinery, construction, and automotive assemblies.
• Environmental compliance assurance with RoHS 3 and REACH standards, supporting sustainable and safe manufacturing practices.
• Enhanced durability from steel material, offering reliable performance under repeated stress without deformation.

Professional Applications & Engineering Value

This zinc-plated steel flat washer is engineered to address common industrial challenges such as corrosion, vibration-induced loosening, and uneven load bearing. The zinc plating provides a protective barrier against moisture and chemicals, crucial for outdoor or high-humidity settings like construction sites and marine equipment. With an inner diameter of 0.406" and outer diameter of 2", it ensures optimal surface coverage for 3/8" screws, distributing forces evenly to prevent damage to connected materials. Its precise thickness range of 0.042-0.051" allows for consistent performance in assemblies requiring tight tolerances, such as automotive frames and machinery mounts, reducing maintenance needs and enhancing operational reliability.

Specification Summary & Compliance

This flat washer adheres to inch system measurements with an inner diameter of 0.406", outer diameter of 2", and thickness between 0.042" and 0.051", designed for use with 3/8" screw sizes. It conforms to industry standards for dimensional accuracy and is manufactured from zinc-plated steel for consistent quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial applications.