S-93413A313 0.438" ID x 1" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 1" OD and 0.438" ID to prevent surface damage and extend joint life in heavy-duty assemblies
• Superior corrosion resistance thanks to black-coated steel construction, ideal for harsh industrial environments and outdoor applications
• High-strength performance with Grade 8 classification and Rockwell C38 hardness, ensuring reliable operation under extreme stress
• Precise dimensional accuracy conforming to USS standards for consistent fit with 3/8" screws, reducing installation errors
• Enhanced durability from robust steel material, resisting wear and deformation in repetitive mechanical applications
• Regulatory compliance assurance with RoHS 3 and REACH standards, supporting safe and sustainable procurement practices
• Broad compatibility with ASME B18.21.1 specifications, facilitating easy integration into existing industrial systems

Professional Applications & Engineering Value

This Grade 8 USS flat washer is engineered to address critical challenges in industrial settings, such as vibration loosening and surface abrasion. Made from black corrosion-resistant coated steel, it provides long-lasting protection against rust and chemical exposure, making it ideal for machinery, construction, and automotive applications. The precise 3/8" screw size and USS designation ensure secure fastening, while the high Rockwell C38 hardness and thickness range of 0.110-0.126" deliver consistent performance under heavy loads. By meeting ASME B18.21.1 standards, this washer reduces maintenance needs and enhances the reliability of industrial washers in demanding environments.

Specification Summary & Compliance

This washer adheres to USS dimensional standards with an ID of 0.438", OD of 1", and thickness between 0.110-0.126", ensuring precise fit for 3/8" screw sizes. It complies with ASME B18.21.1 manufacturing specifications and is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its safety and environmental standards for global industrial use.