S-93852A163 2" ID x 4.25" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel with black-oxide coating, ideal for harsh industrial environments
• Enhanced load distribution with 4.25" OD and 2" ID, preventing surface damage and loosening under heavy loads
• Precise compatibility with 1 7/8" screw sizes, ensuring secure fastening in USS applications
• Durable construction with 0.153-0.213" thickness for long-term reliability in high-stress assemblies
• Compliance with ASME B18.21.1 standards, guaranteeing dimensional accuracy and interchangeability
• Environmental safety assurance through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Versatile inch-system sizing for seamless integration into existing mechanical and structural designs

Professional Applications & Engineering Value

These USS flat washers are engineered to address critical challenges in industrial fastening, where corrosion, vibration, and load stress compromise joint integrity. The black-oxide 18-8 stainless steel construction provides exceptional resistance to rust and chemical exposure, extending service life in demanding sectors like construction, marine, and heavy machinery. With a 4.25" OD and 2" ID, they effectively distribute clamping force over a wider area, reducing bolt fatigue and surface indentation. The precise 1 7/8" screw size compatibility ensures reliable performance in inch-system assemblies, while adherence to ASME B18.21.1 guarantees consistent quality for engineering applications requiring dependable, long-lasting fastening solutions.

Specification Summary & Compliance

This washer meets ASME B18.21.1 dimensional standards for USS flat washers, with an inner diameter of 2", outer diameter of 4.25", and thickness range of 0.153-0.213". Manufactured from black-oxide coated 18-8 stainless steel, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Designed for use with 1 7/8" screw sizes in inch-based systems, it provides reliable performance in mechanical and structural applications without hardness ratings, focusing on corrosion resistance and dimensional precision.