A Socket Head Straight O-Ring Plug is a type of threaded fastener that can be used to seal the ports on a hydraulic cylinder. The socket head allows the plug to be tightened or loosened with an Allen wrench, while the tapered bore provides a leak-tight seal. Socket head Straight O-Ring plugs are used in hydraulic cylinders because they are easy to install and maintain, and they provide a reliable and leak-tight seal.Attributes:• Provides a tight and secure seal, preventing fluid leakage from the cylinder• Hexagonal socket head design allows for easy access and tightening in confined spaces• Withstands high pressures within the hydraulic cylinder• 9/16-18 type threadApplications:This Socket Head Straight O-Ring Plug is mounted at the hydraulic cylinder in a quick coupler lock to provide a secure seal for ports or openings in the cylinder.