S-98029A047 0.281" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior load distribution with 0.75" outer diameter to prevent surface damage and fastener embedment
• Enhanced corrosion resistance from black-oxide steel construction for extended service life in harsh environments
• Precision fit for 1/4" screws with 0.281" inner diameter ensuring secure fastening and alignment
• Durable steel construction providing reliable mechanical strength and vibration resistance
• Regulatory compliance assurance with RoHS 3 and REACH standards for global market acceptance
• Consistent dimensional accuracy with thickness range of 0.130-0.150" for uniform performance across applications
• Versatile inch system compatibility designed for North American industrial standards and replacement parts

Professional Applications & Engineering Value

These black-oxide steel flat washers deliver critical engineering solutions by addressing common industrial fastening challenges. The black-oxide surface treatment provides essential corrosion protection while maintaining dimensional stability, making them ideal for automotive assemblies, machinery manufacturing, and outdoor equipment where environmental exposure is a concern. The precise 0.281" ID ensures perfect alignment with 1/4" screws, eliminating play and reducing stress concentration points. The 0.75" OD effectively distributes clamping force across wider surfaces, preventing damage to soft materials and maintaining joint integrity under dynamic loads. These industrial washers serve as reliable components in vibration-prone applications, electrical enclosures, and structural assemblies where consistent performance and regulatory compliance are paramount.

Specification Summary & Compliance

Manufactured to standard inch system specifications with inner diameter of 0.281", outer diameter of 0.75", and thickness ranging 0.130-0.150" for consistent dimensional accuracy. Constructed from black-oxide steel for optimal mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations current as of January 17, 2023, ensuring environmental safety and global market accessibility for industrial and commercial applications.