S-92217A369 0.125" ID x 0.438" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Precise dimensional fit with 0.125" ID and 0.438" OD, providing accurate alignment and load distribution for No. 4 screws.
• Consistent performance guaranteed by compliance with the rigorous ASME B18.21.1 standard for flat washers.
• Enhanced durability with a controlled thickness range of 0.036-0.045", offering reliable spacing and vibration resistance.
• Environmental compliance with RoHS 3 and REACH regulations, making them safe for global industrial supply chains.
• Versatile industrial application due to inch system measurements, ideal for machinery, equipment assembly, and maintenance.
• Reduced maintenance needs thanks to the material's inherent resistance to rust and oxidation.

Professional Applications & Engineering Value

These 18-8 stainless steel flat washers are engineered to address common industrial challenges such as fastener loosening, surface damage, and corrosion-induced failure. The inch-sized dimensions (0.125" ID x 0.438" OD) and precise flat washer design ensure even load distribution and secure fastening for No. 4 screws, minimizing stress concentrations. Made from corrosion-resistant 18-8 stainless steel, they excel in demanding environments—including outdoor, marine, and chemical processing applications—where moisture and corrosive agents are present. By preventing galvanic corrosion and maintaining integrity under vibration, these washers extend equipment lifespan and reduce downtime, offering reliable performance in assembly lines, automotive components, and electronic enclosures.

Specification Summary & Compliance

This flat washer meets ASME B18.21.1 specifications, ensuring dimensional accuracy and performance for inch-system applications. It features an inner diameter of 0.125", outer diameter of 0.438", and thickness between 0.036" and 0.045", suitable for No. 4 screw sizes. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for hazardous substances.