HeluKabel Polyamide PA6 Cable Glands and Lock Nuts - HELUKABEL 10098166, A locking nut, or counter-nut, made from polyamide PA 6 to complement the Helukabel Helutop HT series of cable glands.
It reduces the possibility of the gland unscrewing in service.
Additionally, the locking nut has a built-in collar, providing a bigger surface area, and offers superior sealing when used with an O-ring (not included).
HELUKABEL 10098166 M25 Lock Nut For Black Dome Cable Gland