S-90377A149 0.281" ID x 0.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Excellent load distribution due to precise 0.625" OD and 0.281" ID, preventing surface damage and loosening under vibration.
• Enhanced durability with Rockwell B68 hardness, maintaining structural integrity under repeated stress and heavy loads.
• Reliable fit for 1/4" screws, ensuring easy installation and secure fastening in industrial assemblies.
• Consistent thickness (0.110-0.140") for uniform performance and predictable gap filling in various applications.
• Compliance with RoHS 3 and REACH standards, guaranteeing safety and environmental responsibility in global supply chains.
• Versatile inch system compatibility, making it suitable for a wide range of machinery and equipment requiring precise imperial measurements.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges such as corrosion, vibration-induced loosening, and uneven load distribution. Made from Black-Oxide 18-8 Stainless Steel, it provides exceptional resistance to rust and chemicals, extending the lifespan of assemblies in demanding sectors like automotive, marine, and outdoor equipment. The precise 0.281" ID and 0.625" OD ensure a snug fit for 1/4" screw applications, reducing the risk of fastener failure and maintenance costs. Its robust design, combined with a controlled thickness range, offers reliable performance in heavy-duty machinery, electrical enclosures, and structural frameworks, where consistent pressure distribution and compliance with RoHS and REACH standards are critical for operational safety and regulatory adherence.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.281", outer diameter of 0.625", and thickness ranging from 0.110" to 0.140", designed for use with 1/4" screws in inch-based systems. Manufactured from 18-8 Stainless Steel with a Black-Oxide finish, it achieves a hardness of Rockwell B68 for dependable mechanical performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for international industrial applications requiring high corrosion resistance and dimensional accuracy.