Brass Pipe Fitting, 1 Inch Square Head Plug

This brass fitting offers good corrosion resistance, so it's suitable for use with various fluids and gases, including hydraulic fluid. It's made to last in demanding environments.

Brass holds up well against corrosion, which is a big part of why it gets used for plugs like this one in fluid and gas systems. The square head gives you something solid to grab onto with a wrench, so you're not fighting it during installation or if you ever need to pull it back out. For sealing off an open port in a system that sees regular exposure to fluids, this is a practical and durable choice.