This premium Mako AISI 316 marine grade thru-hull (skin fitting) is designed for either above or below waterline use.
They are manufactured from marine grade stainless steel ensuring safety is paramount via construction materials, via high quality threads and assembly. These products are quality assured throughout the manufacturing and assembly process.
Typical applications are for seawater intake, sink, cockpit and bilge drainage.
They have full ISO thread lengths and are fitted with BSP thread and nut.
See diagrams to ensure they meet your requirements.