S-98029A053 0.719" ID x 1.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through black-oxide steel coating for prolonged service life in harsh industrial environments
• Precise dimensional fit with 0.719" ID and 1.25" OD ensuring reliable seating and load distribution for 5/8" fasteners
• Optimized thickness range (0.230-0.255") provides consistent compression and vibration resistance in assembled joints
• Full regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Heavy-duty construction from steel material delivering superior strength and durability under high-stress conditions
• Inch-system compatibility designed for seamless integration with North American industrial equipment and specifications

Professional Applications & Engineering Value

This black-oxide steel flat washer delivers critical engineering advantages in industrial fastening systems where corrosion prevention and dimensional precision are paramount. The black-oxide surface treatment creates a protective barrier against moisture and chemical exposure, significantly extending component lifespan in manufacturing equipment, outdoor machinery, and automotive assemblies. With its precise 0.719" ID ensuring perfect alignment with 5/8" fasteners and 1.25" OD providing optimal load distribution, this washer prevents joint loosening from vibration and thermal cycling. The controlled thickness tolerance (0.230-0.255") maintains consistent clamping force in high-vibration environments, making it ideal for heavy machinery, structural steel connections, and industrial maintenance applications requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with 0.719" inner diameter and 1.25" outer diameter, this flat washer maintains precise fit for 5/8" screw applications. The thickness range of 0.230-0.255" ensures consistent performance across production batches. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a) for lead as steel alloying element and full REACH (EC 1907/2006) adherence regarding Substance of Very High Concern restrictions as of January 2023.