S-91090A101 0.188" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Precise dimensional fit with 0.188" ID and 0.75" OD ensuring perfect alignment with No. 8 screws
• Consistent load distribution through controlled 0.042-0.051" thickness range, preventing surface damage
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe global procurement
• Reliable mechanical performance from steel material providing durable support in assembly applications
• Versatile compatibility with inch-system fasteners, ideal for North American industrial equipment

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical protection against galvanic corrosion and surface abrasion in mechanical assemblies. The 0.188" ID provides exact clearance for No. 8 screw size fasteners, while the generous 0.75" OD creates an optimal bearing surface that distributes clamping forces evenly. This prevents joint loosening and material deformation in industrial equipment, electrical enclosures, and machinery frames. The zinc plating forms a sacrificial layer that withstands humidity and chemical exposure, making these flat washers ideal for outdoor applications and manufacturing facilities where environmental factors degrade unprotected components.

Specification Summary & Compliance

Manufactured to standard inch dimensions with 0.188" inner diameter, 0.75" outer diameter, and 0.042-0.051" thickness tolerance. These flat washers comply with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning chemical safety. The zinc-plated steel construction ensures consistent performance across temperature variations and mechanical stress conditions common in industrial fastener applications.