S-98370A021 0.406" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with Rockwell B83 hardness, providing reliable load distribution and resistance to deformation
• Precise dimensional compatibility with 0.406" ID and 1" OD, offering perfect fit for 3/8" screw applications
• Enhanced surface protection through optimal thickness (0.105-0.130"), preventing surface damage and maintaining joint integrity
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use across global markets
• Durable performance in inch system applications, delivering consistent results in industrial assemblies
• Versatile application capability across multiple industries due to stainless steel's excellent chemical resistance

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 18-8 stainless steel flat washers provide critical solutions for corrosion-prone applications where fastener integrity is paramount. The Rockwell B83 hardness rating ensures maintained clamping force under vibration and thermal cycling, while the precise 0.406" ID x 1" OD dimensions guarantee proper seating for 3/8" screw size fasteners. Particularly valuable in chemical processing, marine, and food equipment applications, these inch system washers prevent galvanic corrosion and withstand aggressive cleaning agents. The optimized thickness range (0.105-0.130") provides ideal compression characteristics without compromising the fastened materials, making them essential components in heavy-duty assembly scenarios where reliability cannot be compromised.

Specification Summary & Compliance

This flat washer maintains precise inch system dimensions with 0.406" inner diameter and 1" outer diameter, specifically engineered for 3/8" screw size applications. Manufactured from 18-8 stainless steel with Rockwell B83 hardness, it delivers consistent mechanical performance. The product fully complies with RoHS 3 (2015/863/EU) restrictions and REACH (EC 1907/2006) regulations regarding SVHC substances (updated 01/17/2023), ensuring environmental responsibility and workplace safety standards are met for industrial distribution and use.