S-98099A036 0.781" ID x 1.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black-oxide steel finish, extending service life in demanding industrial environments.
• Optimal load distribution with a large 1.625" outer diameter, minimizing surface pressure and preventing material damage.
• Precise fit and secure fastening ensured by the 0.781" inner diameter, designed specifically for 3/4" screws.
• Consistent performance and reliability due to the controlled thickness range of 0.230" to 0.255" for uniform clamping force.
• Enhanced durability in heavy-duty applications provided by the robust steel material construction.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental standards.
• Versatile compatibility with inch-system components, simplifying procurement and assembly.

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to solve critical challenges in industrial assembly and machinery. Its black-oxide coating provides a protective barrier against rust and corrosion, which is essential for equipment operating in humid or corrosive environments, thereby reducing maintenance frequency and replacement costs. The precise 0.781" ID and 1.625" OD dimensions ensure a perfect fit for 3/4" screw applications, distributing load evenly to prevent joint loosening, bolt head embedment, and surface damage under high vibration or dynamic loads. Commonly used in construction, automotive, and heavy machinery, this flat washer enhances the integrity of bolted connections, supporting long-term structural stability and operational safety in heavy-duty settings.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.781", outer diameter of 1.625", and a thickness range of 0.230" to 0.255", designed for use with 3/4" screws in inch measurement systems. It is manufactured from steel with a black-oxide surface treatment. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel, and REACH (EC 1907/2006) as of January 17, 2023, including 233 SVHCs, ensuring adherence to stringent environmental and safety regulations for industrial components.