S-90313A307 0.281" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Exceptional load distribution with a large 2.5" outer diameter, minimizing surface pressure and preventing material damage.
• Precise fit for 1/4" screws with a 0.281" inner diameter, ensuring secure fastening and reducing installation errors.
• Durable mechanical performance from consistent thickness (0.051-0.080"), providing reliable spacing and vibration resistance.
• Compliance with strict environmental regulations, being RoHS 3 and REACH compliant for safe use in regulated industries.
• Broad industrial compatibility with inch system measurements, facilitating easy integration into existing machinery and equipment.
• Cost-effective maintenance due to stainless steel's longevity, reducing replacement frequency and downtime.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. Its robust stainless steel material offers excellent resistance to moisture, chemicals, and high temperatures, making it ideal for applications in construction, automotive assemblies, and marine equipment. The precise 2.5" OD and 0.281" ID dimensions ensure a perfect match for 1/4" screw size fasteners, enhancing joint integrity and preventing loosening under dynamic loads. By providing a reliable barrier against galvanic corrosion and distributing stress evenly, this flat washer extends the service life of connected components, reducing maintenance costs and improving overall system safety in demanding industrial washers applications.

Specification Summary & Compliance

This flat washer adheres to standard inch system measurements with an inner diameter of 0.281", outer diameter of 2.5", and thickness ranging from 0.051" to 0.080", designed specifically for 1/4" screw sizes. It conforms to general industrial standards for dimensional accuracy and is manufactured from 18-8 stainless steel for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for hazardous substance restrictions.