S-91434A365 0.188" ID x 0.438" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with black corrosion-resistant coated steel for extended service life in harsh environments
• Precise dimensional fit with 0.188" ID and 0.438" OD ensuring perfect compatibility with No. 8 screws
• Optimized load distribution through flat washer design that prevents surface damage and maintains joint integrity
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed dimensional accuracy and performance
• Environmental regulation adherence with full RoHS 3 and REACH compliance for safe, sustainable industrial use
• Versatile thickness range from 0.036" to 0.065" providing flexibility for various gasketing and spacing requirements
• Reliable mechanical performance in inch-system applications without requiring hardness-rated specifications

Professional Applications & Engineering Value

This SAE flat washer delivers critical engineering solutions where corrosion resistance and dimensional precision are paramount. The black corrosion-resistant coated steel construction actively combats environmental degradation in industrial settings, while the standardized 0.188" ID and 0.438" OD dimensions ensure perfect alignment with No. 8 screw applications. Engineers value this washer's ability to distribute clamping loads evenly across surfaces, preventing material deformation and maintaining joint integrity in mechanical assemblies, automotive components, and electrical enclosures. The flat profile provides reliable sealing capabilities while accommodating minor surface irregularities, making it ideal for production lines requiring consistent fastener performance and reduced maintenance intervals.

Specification Summary & Compliance

This SAE flat washer features precise inch-system dimensions with 0.188" internal diameter and 0.438" outer diameter, manufactured in accordance with ASME B18.21.1 standard specifications. The product maintains dimensional tolerances appropriate for Class 2A fit applications and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors while meeting international quality standards for mechanical fasteners.