The T&S Brass 001019-45 Coupling Nut Washer is designed for reliable performance in various hardware applications. With a 3/4" inner diameter and a 1-1/8" outer diameter, this washer ensures a secure fit and optimal sealing. Constructed to meet UL standards, it offers durability and safety for your plumbing and mechanical needs. Ideal for use in coupling assemblies, this washer enhances the integrity of connections, making it a valuable addition to your toolkit.