S-99041A217 0.406" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution - Square shape provides superior surface contact compared to round washers, preventing fastener loosening and material damage in high-vibration applications
• Superior Corrosion Resistance - Zinc-plated steel construction offers reliable protection against rust and environmental degradation in demanding industrial settings
• Precision Fit for 3/8" Fasteners - 0.406" inner diameter ensures optimal compatibility and secure fastening with standard 3/8" screws
• Exceptional Mechanical Strength - Rockwell B40 hardness rating guarantees durability and maintains structural integrity under heavy loads
• Optimized Thickness Range - 0.042-0.051" thickness provides ideal compression characteristics while maintaining washer integrity
• Regulatory Compliance Assurance - Meets RoHS 3 and REACH standards, ensuring environmental safety and global market acceptance
• Versatile Industrial Application - 0.75" width offers substantial bearing surface for various mounting and structural applications

Professional Applications & Engineering Value

This zinc-plated steel square washer delivers critical engineering solutions for industrial applications where standard round washers fall short. The square configuration provides four-point contact stability, effectively preventing rotation and maintaining alignment in heavy-duty equipment, structural frameworks, and machinery assemblies. The zinc plating creates a sacrificial barrier that significantly extends service life in corrosive environments, reducing maintenance frequency and replacement costs. Engineered specifically for 3/8" screw applications, this washer ensures precise fitment while the substantial 0.75" width distributes clamping forces evenly across a wider surface area, preventing surface damage to softer materials. The combination of Rockwell B40 hardness and controlled thickness range (0.042-0.051") provides optimal compression characteristics without sacrificing durability, making it ideal for vibration-prone applications across construction, manufacturing, and automotive sectors.

Specification Summary & Compliance

This square washer features precise dimensional specifications including 0.406" inner diameter, 0.75" width, and thickness range of 0.042-0.051" manufactured to inch system standards. The component maintains Rockwell B40 hardness for consistent mechanical performance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates as of June 14, 2023. The zinc-plated steel construction ensures reliable performance while meeting international environmental and safety standards for industrial applications.