(S211-4) SQUARE HEAD PIPE PLUG 1/4

For sealing off an unused 1/4 inch NPT threaded port, this square head pipe plug is the right type. It is made to block ports and openings on things like valves, manifolds, and cylinders so you can get a secure, leak-free seal.

For sealing an unused 1/4-inch NPT port on a hydraulic manifold, this is exactly the right type of plug. The square head design gives you solid tool engagement so you can get a proper torque on it without slipping, which matters a lot in tight quarters where there isn't much room to maneuver. It's made by Midland Industries and fits standard 1/4-inch NPT threaded ports, so it should drop right in without any fuss.