S-90313A234 0.406" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Optimal load distribution from the large 2.5" OD, minimizing surface damage and loosening under vibration.
• Precise fit for 3/8" screws with a 0.406" ID, providing secure fastening and reducing assembly errors.
• Consistent thickness (0.106-0.130") ensures uniform pressure and stability in demanding applications.
• Compliance with RoHS 3 and REACH guarantees environmental safety and meets global regulatory standards.
• Durable, non-magnetic properties ideal for electrical and marine applications where material integrity is critical.
• Versatile industrial use across machinery, construction, and heavy equipment due to robust inch-system sizing.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. Its 0.406" ID ensures a snug fit for 3/8" screws, preventing misalignment in assemblies, while the large 2.5" OD disperses clamping force effectively, protecting soft surfaces and reducing stress concentrations. The stainless steel material offers excellent resistance to moisture, chemicals, and high temperatures, making it suitable for heavy-duty washers in construction, marine, and machinery sectors. By maintaining precise thickness tolerances (0.106-0.130"), it delivers consistent performance in vibration-prone environments, enhancing the longevity of fastened joints and minimizing maintenance downtime.

Specification Summary & Compliance

This flat washer adheres to inch-system measurements with an inner diameter of 0.406", outer diameter of 2.5", and thickness range of 0.106-0.130", designed for 3/8" screw size applications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use. Manufactured from 18-8 stainless steel, it meets general industry standards for corrosion resistance and durability, though hardness is not rated, focusing instead on reliable performance in diverse conditions.