S-90377A214 0.938" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel with black-oxide coating, ideal for harsh industrial environments.
• Excellent load distribution with a large 2.5" outer diameter, preventing surface damage and joint loosening.
• Precise fit for 7/8" screws with a 0.938" inner diameter, ensuring secure fastening and alignment.
• Durable construction with a thickness range of 0.170-0.200", providing reliable performance under heavy loads.
• Environmental compliance with RoHS 3 and REACH standards, meeting global safety and regulatory requirements.
• Versatile inch system compatibility, making it easy to integrate into existing North American machinery and designs.
• Long-lasting performance due to the material's inherent strength and protective finish, reducing replacement frequency.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel Flat Washer is engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. The 18-8 stainless steel core offers inherent resistance to rust and chemicals, while the black-oxide surface treatment enhances durability and reduces galling in high-stress applications. With an ID of 0.938" and OD of 2.5", it effectively spreads clamping force for 7/8" screws, preventing damage to soft materials and maintaining bolt tension in vibrating machinery. Ideal for heavy-duty industrial washers use in construction, marine, and automotive sectors, this component ensures long-term reliability and reduces maintenance costs by withstanding extreme conditions without degradation.

Specification Summary & Compliance

This flat washer features precise dimensions with an inner diameter of 0.938", outer diameter of 2.5", and thickness ranging from 0.170" to 0.200", designed for use with 7/8" screws in inch-based systems. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial applications. The material and manufacturing adhere to common industry practices for stainless steel flat washers, providing consistent performance without rated hardness specifications.