S-98029A029 0.281" ID x 0.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish for extended service life in demanding environments
• Precise dimensional fit with 0.281" ID specifically engineered for secure 1/4" screw applications
• Optimal load distribution through 0.625" OD design that minimizes surface pressure and prevents material damage
• Consistent performance maintained through controlled thickness range of 0.105-0.130" for reliable spacing and tension
• Global compliance assurance with RoHS 3 (2015/863/EU) and REACH certification for international industrial applications
• Enhanced assembly integrity through flat washer design that prevents loosening and maintains joint security
• Versatile industrial compatibility with inch measurement system for seamless integration into existing equipment and machinery

Professional Applications & Engineering Value

This black-oxide steel flat washer delivers exceptional engineering value by addressing common industrial fastening challenges. The black-oxide surface treatment provides superior corrosion resistance, significantly extending component life in humid or chemically aggressive environments where standard washers would deteriorate. With precise 0.281" inner diameter specifically designed for 1/4" screws, it ensures perfect fitment while the 0.625" outer diameter optimally distributes clamping force to prevent surface damage to assembled materials. The controlled thickness range of 0.105-0.130" maintains consistent spacing and preload in critical assemblies, making these industrial washers ideal for machinery, automotive, and construction applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This flat washer features precise inch-dimension specifications with 0.281" inner diameter, 0.625" outer diameter, and thickness ranging from 0.105" to 0.130" for consistent performance in 1/4" screw applications. Manufactured from black-oxide steel for enhanced durability, the product maintains full compliance with RoHS 3 (2015/863/EU) standards under exemption 6(a) for lead as an alloying element in steel, and is REACH (EC 1907/2006) compliant with the latest substance of very high concern (SVHC) listing as of January 17, 2023, ensuring environmental responsibility and global market acceptance.