Key benefits Reliable seal for unused pipe ends or fittings: the brass blind cap stops leaks and protects threads from dirt and damage. Easy to install and remove: hexagonal shape accepts a wrench for secure tightening and simple maintenance. Long-lasting performance: solid brass construction resists deformation, remains ductile at high temperatures, and has low magnetic permeability. Product features and specifications Threaded section: 2.5 cm internal threaded section for secure engagement with compatible fittings. Inner thread diameter: approximately 5 mm. Please verify this size against your existing fittings before purchase. Shape: machined hexagon body for positive wrench grip and consistent sealing torque. Material: high-quality brass for corrosion resistance, dimensional stability, and durability compared to plastic or soft metals. Why customers need this product Prevents leaks and contamination when a pipe end or fitting is not in use. Protects threads during storage, transport, or equipment downtime. Provides a durable, reusable solution that withstands temperature changes and mechanical stress. Typical applications Household plumbing: cap off faucet adapters, exposed pipe ends, or branch lines during repairs. Irrigation and outdoor systems: seal unused outlets or spigots to prevent debris and pests from entering. Industrial and HVAC systems: temporarily close off service ports, radiators, or small piping branches during maintenance. Installation tips Confirm the inner thread diameter (approx. 5 mm) matches the mating part before installation. Use an appropriate wrench on the hex body to avoid over-torquing and ensure a leak-free seal. Inspect sealing surfaces for debris or damage before assembly to maintain optimal sealing performance. Compatibility note Designed to mate with common pipe fittings and connectors compatible with a 2.5 cm internal threaded section and ~5 mm thread diameter. Check dimensions carefully to ensure a proper fit.