S-91133A186 0.312" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, extending service life in harsh industrial environments
• Exceptional load distribution from the 2" square design, preventing surface damage and maintaining joint integrity
• Precise 1/4" screw compatibility with 0.312" ID, ensuring secure fastening and reducing installation errors
• Enhanced durability with Rockwell B40 hardness, providing reliable performance under repeated stress
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, facilitating global supply chain integration
• Optimized thickness range (0.220-0.280") for consistent performance across varying compression requirements
• Heavy-duty construction readiness with inch system specifications, ideal for North American industrial applications

Professional Applications & Engineering Value

This galvanized steel square washer delivers critical engineering solutions where standard washers fail. The 2" width provides 400% more surface contact than typical round washers, effectively distributing clamp load in structural steel connections, heavy machinery assemblies, and construction frameworks. The zinc coating creates a sacrificial barrier against moisture and chemicals, addressing corrosion-induced failure in outdoor installations and industrial plants. With Rockwell B40 hardness, it maintains dimensional stability under high vibration environments, while the precise 0.312" ID ensures perfect alignment with 1/4" screws, eliminating play that compromises joint security. This combination of material strength and geometric advantage makes it indispensable for engineers specifying durable fastening systems.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with 0.312" inner diameter and 2" width. Thickness tolerance maintained at 0.220-0.280" for consistent performance. Constructed from galvanized steel with Rockwell B40 hardness rating. Designed specifically for 1/4" screw sizes. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations as of January 2023 SVHC list.