S-91090A122 0.406" ID x 1.625" 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" ID and 1.625" OD, ensuring reliable load distribution for 3/8" screws.
• Consistent thickness tolerance (0.042-0.051") for uniform pressure application and reduced assembly variability.
• Robust material durability from zinc-plated steel, providing excellent wear resistance in high-vibration applications.
• Global compliance assurance with RoHS 3 and REACH standards, meeting international environmental and safety regulations.
• Seamless inch-system compatibility for easy integration with existing industrial equipment and fastener systems.
• Enhanced surface protection that minimizes galvanic corrosion when paired with compatible steel fasteners.

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions for industrial assembly challenges. The zinc plating provides a sacrificial layer that significantly enhances corrosion resistance, making these washers ideal for applications exposed to moisture, chemicals, or outdoor elements. With precise 0.406" ID and 1.625" OD dimensions, they ensure optimal load distribution under 3/8" screw heads, preventing surface damage and maintaining joint integrity in machinery, structural frameworks, and heavy equipment. The controlled thickness tolerance guarantees consistent clamping force, while the inch system specification ensures compatibility with North American industrial standards. These flat washers serve as essential components in automotive, construction, and manufacturing sectors where reliable fastening and long-term performance are paramount.

Specification Summary & Compliance

This flat washer features precise inch-system dimensions with 0.406" internal diameter, 1.625" outer diameter, and thickness ranging from 0.042" to 0.051". Manufactured from zinc-plated steel, it is designed specifically for use with 3/8" screws. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to strict environmental and safety standards for industrial components.