S-93852A142 1.5" ID x 3.25" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction
• Exceptional load distribution with a large 3.25" outer diameter to protect surfaces and prevent embedment
• Reliable dimensional fit with a precise 1.5" inner diameter for secure mounting on 1 3/8" screws
• Enhanced mechanical durability from Rockwell B68 hardness, resisting deformation under high stress
• Guaranteed interchangeability and quality assurance through compliance with the ASME B18.21.1 standard
• Safe for regulated industries with full RoHS 3 and REACH compliance, free from hazardous substances
• Robust construction with a substantial thickness (0.153-0.213") for long service life in demanding applications

Professional Applications & Engineering Value

This 316 Stainless Steel USS Flat Washer is engineered to solve critical challenges in industrial fastening. Its high corrosion resistance makes it ideal for marine, chemical processing, and outdoor applications where moisture and corrosive agents are prevalent. The USS flat washer design, with its large outer diameter, effectively distributes clamping force over a wider area, preventing joint loosening and surface damage to softer materials. Manufactured to ASME B18.21.1, it ensures precise dimensions and reliable performance in heavy-duty assemblies, from structural steelwork to large machinery. The combination of Rockwell B68 hardness and robust thickness provides the structural integrity needed to maintain bolt preload and joint security under vibration and dynamic loads, delivering long-term engineering value and reduced maintenance costs.

Specification Summary & Compliance

This washer conforms to dimensional standards per ASME B18.21.1 for USS type flat washers in the inch system. Key specifications include an Inside Diameter (ID) of 1.5", Outside Diameter (OD) of 3.25", and a Thickness range of 0.153-0.213", designed for a 1 3/8" screw size. The material is 316 Stainless Steel with a hardness of Rockwell B68. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.