S-93852A133 0.438" ID x 1" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to premium 316 stainless steel construction
• Superior load distribution with a large 1" outer diameter that protects surfaces and prevents joint loosening
• Precise fit for 3/8" screws ensured by the 0.438" inner diameter, reducing installation errors
• Enhanced durability and wear resistance from Rockwell B68 hardness, extending service life
• Guaranteed dimensional consistency through compliance with ASME B18.21.1 standards
• Safe for sensitive applications with full RoHS 3 and REACH compliance, free from hazardous substances
• Reliable performance in heavy-duty assemblies thanks to the USS flat design and inch system measurements

Professional Applications & Engineering Value

These 316 stainless steel USS flat washers are engineered to address common industrial challenges, such as galvanic corrosion and mechanical stress in demanding environments. The high chromium and nickel content in 316 stainless steel provides excellent resistance to chemicals, saltwater, and extreme temperatures, making them ideal for marine, chemical processing, and outdoor infrastructure projects. The flat washer design with a 1" OD distributes clamping force evenly, preventing surface damage and maintaining bolt preload in heavy-duty applications. By adhering to ASME B18.21.1, these washers ensure precise dimensions and reliable performance, reducing downtime and maintenance costs in mechanical fastening systems.

Specification Summary & Compliance

This washer meets ASME B18.21.1 specifications for dimensional accuracy, including an ID of 0.438", OD of 1", and thickness range of 0.064–0.104". It is manufactured from 316 stainless steel with a hardness of Rockwell B68 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.