The 4PLUG-1MP fitting from Fittings Unlimited Inc is a versatile solution for sealing threaded connections in various applications. This plug features a 4mm diameter and is designed for compatibility with standard fittings. Made from durable materials, it offers excellent resistance to corrosion and wear, making it suitable for both indoor and outdoor use. Its compact design allows for easy installation and removal, while maintaining a secure seal under pressure. Ideal for plumbing, hydraulic, and pneumatic systems, this plug meets industry standards for safety and performance.