S-90126A204 0.188" ID x 0.438" OD SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Enhanced load distribution from SAE flat design, preventing surface damage and maintaining joint integrity under Grade 5 fastener loads
• Precision dimensional fit with 0.188" ID specifically engineered for No. 8 screws, ensuring secure fastening without slippage
• Optimal thickness range (0.036-0.065") provides consistent spacing and vibration resistance in assembly applications
• Reliable Grade 5 compatibility matches medium-strength bolt requirements for robust mechanical connections
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety mandates
• Versatile industrial applicability across machinery, equipment, and structural assemblies requiring inch-system fasteners

Professional Applications & Engineering Value

These Grade 5 zinc-plated steel SAE flat washers deliver critical engineering solutions where corrosion protection and reliable load bearing are paramount. The zinc plating creates a sacrificial barrier against oxidation, significantly outperforming uncoated alternatives in humid or chemically exposed environments. With precise 0.188" ID matching No. 8 screw specifications, these washers eliminate play while the 0.438" OD provides optimal surface coverage to prevent embedding in softer materials. The SAE flat washer profile ensures uniform pressure distribution across Grade 5 fastener assemblies, reducing stress concentration in automotive, machinery, and structural applications where vibration resistance and joint integrity are critical performance factors.

Specification Summary & Compliance

Manufactured to SAE standards with dimensional specifications: 0.188" inner diameter, 0.438" outer diameter, and 0.036-0.065" thickness range. Compatible with No. 8 screw fasteners and engineered for use with Grade 5 strength class components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates, ensuring environmental safety and regulatory acceptance for industrial distribution and use.