S-91117A213 0.344" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc plating, extending service life in humid or outdoor environments
• Optimal load distribution with 2" outer diameter, preventing surface damage and fastener loosening under heavy loads
• Enhanced vibration resistance maintaining joint integrity in high-stress industrial applications
• Precise 5/16" screw compatibility ensuring perfect fit and uniform pressure distribution
• Consistent performance backed by Rockwell B40 hardness rating for reliable mechanical properties
• Regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Durable zinc-plated steel construction providing excellent strength-to-weight ratio for demanding applications

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial assembly challenges. The 2" outer diameter provides exceptional bearing surface area, effectively distributing clamp load and preventing embedment in soft materials. The zinc plating creates a protective barrier against corrosion, making these flat washers ideal for outdoor equipment, structural steel connections, and machinery exposed to moisture. With precise 0.344" inner diameter matching 5/16" screw size, these components ensure proper alignment and prevent galvanic corrosion between dissimilar metals. The Rockwell B40 hardness maintains dimensional stability under sustained pressure, while the inch system measurements guarantee compatibility with North American industrial standards.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 0.344" ID and 2" OD in inch system measurements. Features consistent 0.110-0.140" thickness tolerance and Rockwell B40 hardness for reliable performance. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations updated January 17, 2023, covering 233 SVHC substances. Designed specifically for use with 5/16" screw size in industrial fastening applications.