S-98029A046 0.406" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through black-oxide steel construction for extended service life in demanding environments
• Precise dimensional fit with 0.406" ID ensuring secure seating on 3/8" fasteners and consistent performance
• Optimal load distribution with 1" OD design that minimizes surface pressure and prevents material damage
• Reliable thickness tolerance (0.105-0.130") providing consistent spacing and vibration resistance in assemblies
• Full regulatory compliance with RoHS 3 and REACH standards for safe use in global industrial applications
• Versatile inch system compatibility designed for seamless integration with North American machinery and equipment
• Durable steel construction offering excellent mechanical strength for heavy-duty automotive and construction applications

Professional Applications & Engineering Value

This black-oxide steel flat washer delivers exceptional engineering value through its corrosion-resistant surface treatment and precision dimensions. The black-oxide coating provides superior protection against rust and oxidation, making it ideal for automotive assemblies, construction equipment, and industrial machinery where environmental exposure is a concern. The precisely controlled 0.406" inner diameter ensures perfect alignment with 3/8" fasteners, eliminating installation issues and reducing assembly time. With its 1" outer diameter, this industrial-grade washer effectively distributes clamping force across a wider surface area, preventing joint loosening due to vibration and thermal cycling. The combination of inch system specifications and robust steel material makes it particularly valuable for maintenance, repair, and OEM applications requiring reliable, long-lasting fastening solutions.

Specification Summary & Compliance

This flat washer features precise dimensional specifications including 0.406" inner diameter, 1" outer diameter, and thickness ranging from 0.105" to 0.130". Manufactured from black-oxide steel using inch system measurements, it is designed for use with 3/8" fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) requirements as of January 17, 2023, including compliance with 233 SVHC substances, ensuring environmental and safety standards are maintained for industrial applications.