S-91083A009 0.188" ID x 0.438" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior load distribution with precise 0.188" ID and 0.438" OD dimensions for No. 8 screws, preventing surface damage and maintaining joint integrity
• Durable steel construction ensures excellent mechanical strength and resistance to deformation under pressure in demanding applications
• Consistent thickness range of 0.036-0.065" provides reliable spacing and vibration resistance for stable assemblies
• Full compliance with ASME B18.21.1 standards guarantees dimensional accuracy and interchangeability in industrial fastener systems
• RoHS 3 and REACH compliant for environmentally responsible manufacturing and safe use across global markets
• SAE designation compatibility ensures seamless integration with existing inch-based mechanical systems and tooling
• Corrosion-resistant steel material offers long service life in various industrial environments without specialized coatings

Professional Applications & Engineering Value

These SAE flat washers deliver critical engineering solutions where precise load distribution and surface protection are paramount. The steel construction provides exceptional durability for high-stress applications in machinery assembly, automotive systems, and industrial equipment. With exact 0.188" ID sizing for No. 8 screws, these washers eliminate play and prevent loosening from vibration, a common failure point in dynamic environments. The ASME B18.21.1 compliance ensures consistent performance across production runs, while the 0.438" OD offers optimal bearing surface without excessive material usage. These inch system washers are particularly valuable in maintenance operations and OEM applications where standardized components reduce downtime and simplify inventory management.

Specification Summary & Compliance

This SAE flat washer features precise dimensional specifications including 0.188" internal diameter, 0.438" outer diameter, and thickness ranging from 0.036" to 0.065". Manufactured from steel and engineered to meet ASME B18.21.1 standards for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety, making it suitable for global industrial applications requiring environmental responsibility.