S-98049A113 0.188" ID x 0.438" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 17-4 PH stainless steel, ideal for harsh industrial environments and extending service life.
• High strength and durability with Rockwell C40 hardness, providing reliable load distribution and resistance to deformation under stress.
• Precise dimensional fit for No. 8 screws with a 0.188" ID, ensuring secure fastening and reducing assembly errors.
• Optimal surface coverage and bearing area with a 0.438" OD, helping to prevent surface damage and loosening in demanding applications.
• Consistent performance across a controlled thickness range (0.060-0.090"), ensuring uniform clamping force and vibration resistance.
• Full compliance with major environmental regulations including RoHS 3 and REACH, making them suitable for global supply chains and sensitive applications.
• Built for heavy-duty industrial use, offering long-term reliability in mechanical assemblies, machinery, and equipment.

Professional Applications & Engineering Value

These 17-4 PH stainless steel flat washers are engineered to solve critical challenges in industrial applications where corrosion, high stress, and regulatory compliance are paramount. The precipitation-hardening stainless steel material provides superior resistance to corrosive elements, making these inch-system washers ideal for marine, chemical processing, and outdoor equipment. The precise No. 8 screw size compatibility and controlled thickness range ensure even load distribution, preventing joint failure and reducing maintenance needs in heavy-duty assemblies. By integrating high Rockwell C40 hardness with a robust flat washer design, they deliver consistent performance in high-vibration environments, enhancing the longevity and safety of your mechanical systems.

Specification Summary & Compliance

This flat washer adheres to inch-system dimensional standards with an ID of 0.188", OD of 0.438", and a thickness range of 0.060-0.090", designed specifically for No. 8 screw applications. Manufactured from 17-4 PH stainless steel with a hardness of Rockwell C40, it meets stringent quality and performance criteria. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated industries worldwide.