The 4Cap NUT from Fittings Unlimited Inc is a reliable solution for sealing and protecting pipe ends. This cap nut features a 4mm size, crafted from high-quality materials to ensure durability and resistance to wear. Its design allows for easy installation and removal, making it perfect for maintenance tasks. The cap nut meets industry standards, ensuring compatibility with a wide range of systems. Ideal for both residential and commercial applications, the 4Cap NUT provides a secure seal to prevent leaks and maintain system integrity.