Square plug (square tube plug/square tube cap) is a type of pipe fitting used to close square or rectangular tube ports, with core functions including:
Protective: Block the edge of sharp pipe openings to prevent foreign objects from entering or personnel from scratching.
Sealing: Avoid dust and liquid infiltration (some parts are designed with rubber sealing rings to enhance leak prevention).
Decorative: Surface texture or glossy treatment to enhance the aesthetic appeal of the equipment.
Noise reduction and anti slip: LDPE material reduces vibration noise, and end face thickening design enhances stability
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