S-98025A043 1.438" ID x 2.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Superior load distribution thanks to precise 1.438" ID and 2.75" OD dimensions, preventing surface damage and loosening
• High-strength performance with Grade 8 classification and Rockwell C43 hardness, ensuring reliable fastening under heavy loads
• Optimal compatibility designed specifically for 1 3/8" screw sizes, providing secure fit and reduced installation errors
• Enhanced durability from steel construction, maintaining integrity in high-vibration and extreme temperature applications
• Regulatory compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industries
• Consistent thickness control between 0.235-0.264", guaranteeing uniform pressure distribution and joint stability

Professional Applications & Engineering Value

This Grade 8 flat washer delivers critical engineering solutions for heavy-duty industrial applications where failure is not an option. The zinc yellow-chromate plated steel construction provides superior corrosion protection in demanding environments including marine, construction, and manufacturing facilities. With Rockwell C43 hardness and precise dimensional tolerances, these washers effectively distribute clamping force across larger surface areas, preventing joint relaxation and material deformation. The inch-system sizing ensures perfect compatibility with 1 3/8" screw sizes, making them ideal for structural steel connections, heavy machinery assembly, and infrastructure projects requiring reliable, long-lasting fastening performance under sustained vibration and extreme load conditions.

Specification Summary & Compliance

Manufactured to exacting standards with critical dimensions of 1.438" inner diameter and 2.75" outer diameter, this flat washer maintains thickness between 0.235-0.264" for consistent performance. The Grade 8 classification ensures high tensile strength, while the zinc yellow-chromate plating provides enhanced corrosion protection. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, and adherence to REACH (EC 1907/2006) regulations (01/17/2023, 233 SVHC) confirms environmental and safety standards are met for industrial use.