Unused cable entries are common in junction boxes and control cabinets. During field installation, some holes are prepared for future wiring, while others are left after layout changes. If these holes are not sealed correctly, they become an easy path for water, dust and insects.
Why tape is not a reliable solution
Tape and temporary sealant can fail under UV exposure, temperature change, water pressure or maintenance handling. A threaded stopping plug gives a more repeatable mechanical seal and can be matched with a gasket or O-ring.
Plastic or metal stopping plugs
Plastic plugs are suitable for many nylon gland and junction box projects. Metal plugs are often chosen for metal cabinets, stronger mechanical protection or higher temperature environments. The thread standard must match the hole.
Where buyers use them
Stopping plugs are used in distribution boxes, outdoor lighting cabinets, pump panels, CCTV boxes and spare cable entries in OEM equipment. They are often ordered together with cable glands, reducers and sealing washers.
RFQ information
Send thread size, material, color, sealing requirement and quantity. If the hole is already punched, a photo or drawing helps confirm the correct plug type.