S-91117A207 0.281" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction provides superior protection against rust and environmental degradation, extending service life in demanding conditions.
• Optimal Load Distribution: Large 1.5" outer diameter (OD) and 0.281" inner diameter (ID) design effectively spreads clamping force, preventing surface damage and joint failure.
• Consistent Performance & Durability: Rockwell B40 hardness rating ensures the washer maintains its shape and function under repeated stress and vibration.
• Precise Fit for 1/4" Fasteners: Accurate inner diameter guarantees a secure fit on 1/4" screws and bolts, simplifying assembly and improving connection integrity.
• Robust Material Strength: Made from steel, this washer offers high tensile strength for heavy-duty industrial applications.
• Global Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safety and environmental responsibility for international supply chains.
• Dimensional Reliability: Controlled thickness range (0.110-0.140") ensures consistent performance and compatibility in inch-system assemblies.

Professional Applications & Engineering Value

This zinc-plated steel flat washer is engineered to solve critical challenges in industrial assembly and maintenance. Its corrosion-resistant zinc plating is vital for outdoor equipment, automotive underbodies, and marine applications where moisture and chemicals are prevalent. The large OD of 1.5" and robust Rockwell B40 hardness provide exceptional load distribution, preventing bolt head embedding and material surface damage in high-stress connections found in machinery, structural steelwork, and heavy-duty frameworks. By ensuring a secure fit for 1/4" screws, it minimizes loosening from vibration, a common failure point in dynamic systems. This makes it an indispensable component for engineers seeking reliability, longevity, and compliance in their industrial flat washer selections.

Specification Summary & Compliance

This flat washer is manufactured to standard inch system dimensions with an ID of 0.281", OD of 1.5", and a thickness range of 0.110-0.140" for use with 1/4" fasteners. It features a material hardness of Rockwell B40. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, adhering to the latest SVHC list as of 01/17/2023.