S-90377A146 0.25" ID x 0.75" 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 extended service life.
• Precise dimensional fit with 0.25" ID and 0.75" OD, ensuring reliable alignment and load distribution for No. 12 screws.
• Enhanced durability from Rockwell B68 hardness, providing excellent resistance to deformation under pressure.
• Optimal thickness range of 0.060-0.090" for consistent performance and secure fastening in various assemblies.
• Compliance with environmental standards, including RoHS 3 and REACH, meeting strict industrial safety requirements.
• Broad industrial compatibility due to inch system measurements, facilitating easy integration into existing equipment and designs.
• Reliable surface protection from the black-oxide finish, which reduces galling and improves wear resistance.

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel flat washers are engineered to address common industrial challenges such as corrosion, vibration loosening, and material fatigue. The 18-8 stainless steel base offers excellent resistance to rust and chemicals, making them suitable for outdoor, marine, and chemical processing applications. The black-oxide surface treatment enhances corrosion protection and reduces friction during installation, preventing seizing and ensuring smooth assembly. With precise inch system dimensions (0.25" ID and 0.75" OD), these washers provide a secure fit for No. 12 screws, distributing loads evenly to prevent surface damage and extend the life of fastened components. Ideal for machinery, automotive, and construction projects, they deliver consistent performance where reliability and compliance with RoHS and REACH standards are critical.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.25", outer diameter of 0.75", and thickness ranging from 0.060" to 0.090", designed for use with No. 12 screws. Manufactured from 18-8 Stainless Steel with a hardness of Rockwell B68, it ensures dimensional accuracy and strength. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial applications.