The WN 5 by Metro Moulded Parts is a robust expansion rubber well nut, perfect for various fastening needs. Known in the market as an expansion fastener, neoprene nut, or captive brass insert, this versatile part measures 0.829 inches in length and requires a 1/2-inch diameter hole, utilizing a 1/4-20 thread size. Its neoprene body, resilient to ozone and chemicals, ensures durability under challenging conditions while offering easy installation as it expands for a secure fit when tightened. Focused on practicality, the WN 5 features a captivating brass nut molded right into the rubber, delivering strength and reliability. Its expansion as you tighten not only maintains security but also adapts to varying snug surfaces effortlessly, making it ideal for applications demanding consistent performance. Installing the WN 5 is straightforward: simply ensure the correct hole size and tighten, enabling even novices to achieve professional results. Engineered for durability and ease, the WN 5 epitomizes reliable, long-lasting fastening solutions. Whether enhancing current projects or tackling new ones, trust this product's robustness for outstanding results. Buy now and benefit from Metro s leading industry guarantee our platinum warranty secures your purchase with straightforward replacements over 30 years. This "No Hassle" policy means satisfaction and reliability are always assured.