Cable glands are designed to terminate cables into flameproof or increased safety equipment in hazardous areas. They provide a weather and gas-proof sealed connection between cable and equipment, prevent the cable being pulled out or twisted and provide a grounding of the cable armour.
The cost of a cable gland is insignificant when compared to that of other equipment. However, the cost of failure is high.
Though some cable glands may be "fit for purpose" what would be the potential cost of failure?