S-90377A199 0.5" ID x 1.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and extending component lifespan.
• Optimal load distribution with a 1.25" outer diameter, minimizing surface stress and preventing material damage.
• Precise fit for 7/16" screws ensured by the 0.5" inner diameter, providing secure fastening and reducing assembly errors.
• Enhanced durability and stability from a substantial thickness range of 0.170-0.200", suitable for heavy-duty industrial use.
• Reliable performance in regulated industries with full compliance to RoHS 3 and REACH environmental standards.
• Versatile application across various sectors due to robust stainless steel construction and inch system compatibility.
• Long-term cost efficiency by reducing maintenance needs and replacement frequency in demanding applications.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these Black-Oxide 18-8 Stainless Steel flat washers address critical challenges like corrosion and mechanical stress. The corrosion-resistant material prevents rust in humid or chemical-exposed environments, ensuring long-term reliability in industrial applications such as machinery assembly, construction, and marine equipment. With a 0.5" ID and 1.25" OD, they provide excellent load distribution, protecting surfaces from deformation and maintaining fastener integrity. The inch system design and precise dimensions facilitate easy integration with standard 7/16" screws, streamlining installation while enhancing safety and performance in high-stress scenarios.

Specification Summary & Compliance

This flat washer adheres to standard inch measurements with an inner diameter of 0.5", outer diameter of 1.25", and thickness ranging from 0.170" to 0.200", ensuring dimensional accuracy for reliable fit. Manufactured from 18-8 Stainless Steel with a black-oxide finish, it meets general industry requirements for strength and corrosion resistance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in eco-conscious and regulated industrial environments.