Heyco Heyco-Flex™ Metallic Liquid Tight Conduit Fittings feature cost-effective die-cast zinc construction that provides durability and resists rough environments. These conduit fittings are suitable for both wet and dry locations and provide a smooth connection with no sharp edges to strip wire. The Heyco-Flex liquid-tight conduit fittings can fit various common sizes of non-metallic liquid-tight conduits. These conduit fittings require Teflon tape on the connector threads when used in tapped holes, while for other applications they require an O-ring and locknut to achieve a liquid-tight seal. The Heyco-Flex liquid-tight conduit fittings UL certified and DFARS compliant. Typical applications include transformer connections, air conditioning, and heating.