S-94744A159 0.125" ID x 0.375" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in humid or outdoor industrial environments.
• Reliable load distribution due to precise 0.125" ID and 0.375" OD dimensions, preventing surface damage and loosening under vibration.
• Consistent mechanical performance ensured by Rockwell B40 hardness, maintaining shape and function under repeated stress.
• Guaranteed dimensional accuracy through compliance with ASME B18.21.1, ensuring perfect fit for No. 4 screws and reducing assembly errors.
• Enhanced safety and environmental compliance by meeting RoHS 3 and REACH regulations, suitable for regulated industries.
• Optimized for inch-system applications, providing seamless integration with standard US machinery and components.
• Durable zinc-plated steel construction offers excellent wear resistance, ideal for high-cycle assembly operations.

Professional Applications & Engineering Value

This zinc-plated steel flat washer is engineered to address common industrial challenges such as fastener corrosion, uneven load distribution, and compliance with strict environmental standards. The zinc plating provides a protective barrier against rust and chemical exposure, making it ideal for outdoor equipment, automotive assemblies, and electrical enclosures. With precise 0.125" ID and 0.375" OD dimensions, it ensures a secure fit for No. 4 screws, reducing the risk of joint failure and minimizing maintenance downtime. The Rockwell B40 hardness guarantees that the washer maintains its integrity under high-pressure conditions, while adherence to ASME B18.21.1 standards ensures consistent quality and reliability in heavy-duty industrial applications.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.125", outer diameter of 0.375", and thickness range of 0.036-0.045", manufactured from zinc-plated steel with a hardness of Rockwell B40. It complies with ASME B18.21.1 for dimensional and mechanical specifications, and meets RoHS 3 (2015/863/EU) with exemption 6(a) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld for industrial use.