General
Degree of protection	PG 16
Wrench width	30 mm
Colour	Silver grey
Material	Polyamide
Halogen free

The GMP-GL16 counter nut from Lapp is a component specifically developed for use with SKINTOP® cable glands. It serves as a securing element in drilled holes without threads, ensuring the cable gland is fixed securely and permanently. The product is made of polyamide, a robust plastic known for its high mechanical stability and resistance to mechanical stress. The counter nut is halogen-free, making it suitable for applications in areas with increased requirements for fire behaviour and smoke development.

Applications
The counter nut is primarily used in electrical installation, especially when cable glands are mounted in non-tapped or unthreaded holes. It enables secure fastening of the gland without damaging the enclosure. This is particularly important for sensitive or delicate equipment, where mechanical damage from tools must be avoided. The product is used in industrial plants, machine building, and in electrical installations indoors and outdoors, where a durable and secure connection is required.

Functions and Features in Detail
The counter nut has a wrench size of 30 mm, designed for use with an open-ended wrench. This ensures secure and slip-free installation without damaging the device or machine enclosure. The surface is finished in RAL 7001 silver grey, enabling visual harmonization with other components. The material composition of polyamide reinforced with glass fibre ensures high strength and resistance to mechanical stress, extending the component’s service life.

Technology Explained Simply
The counter nut is inserted into the hole and screwed together with the cable gland. The glass fibre reinforcement in the polyamide material increases mechanical stability and prevents failure under load. The halogen-free composition reduces the formation of toxic gases at high temperatures, which is particularly advantageous in enclosed spaces or in fire hazard situations. The silver grey colour is not only aesthetic but also functional, providing good visibility and recognizability during installation.

Compatibility and Accessories
The counter nut is specifically designed for use with SKINTOP® cable glands in PG 16 format. It is used in holes without threads to secure the gland. Compatibility is limited to the PG 16 system, with the wrench size of 30 mm defining the appropriate tool size for installation.

Installation and Mounting
Installation is performed by inserting the counter nut into the hole and then screwing it together with the SKINTOP® cable gland. Using an open-ended wrench with a wrench size of 30 mm ensures secure and slip-free installation. The counter nut ensures the gland does not sit directly in the enclosure but is secured by the nut, enabling even distribution of load.

Operational Advantages
Using the counter nut prevents damage to the enclosure from tools, as installation occurs over a defined surface. The high mechanical stability provided by glass fibre reinforcement ensures long service life and reliability. The halogen-free composition increases safety in fire hazard situations, as no toxic gases are released. The silver grey colour supports visual inspection and recognizability during installation and maintenance.