Four sided threaded pipe cap
Definition: Also known as square plug or square tube cap, it is used to close square or rectangular tube ports and is fixed by threading or inserting a hook.
Function: Protect the edge of the pipe mouth, prevent dust and leakage, decorate and beautify, reduce noise and slip.
hexagon cap
Definition: An internal/external threaded pipe cap designed with a hexagonal head, used to seal the end of a circular pipe.
Function: High pressure sealing (especially for oil and gas pipelines), leak prevention, anti vibration loosening, suitable for tool disassembly and assembly