GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 5/8"

The GROCO Stainless Steel Hose Barb Thru-Hull Fitting in 5/8" (HTH-625-S) is a marine-grade through-hull connection designed for reliable, corrosion-resistant water and fuel line installations on boats and offshore equipment. Built from #316 stainless steel, this thru-hull fitting handles the demanding saltwater environment where standard materials fail, making it essential for serious boaters who demand durability in harsh marine conditions.

The 5/8" hose barb connection accepts standard marine hose sizes while the NPS (National Pipe Straight) thread ensures secure hull penetration through a sealing nut and backing plate. UL Listed under standard 647B certification confirms compliance with marine safety and electrical standards. #316 stainless steel provides superior corrosion resistance compared to lower-grade stainless or aluminum alternatives, particularly in saltwater environments where galvanic corrosion and pitting are constant threats. The barbed design grips hose securely without the need for additional crimping, though marine-grade hose clamps are recommended for maximum reliability.

This fitting suits weekend fishermen upgrading through-hull plumbing systems, commercial operators requiring certified marine components, and serious offshore anglers who rely on systems that won't corrode or fail thousands of miles from port. It's used in bilge pump discharge lines, raw water cooling systems, fuel fill standpipes, and any application requiring a permanent, non-corrosive hull penetration with positive hose engagement.

GROCO has established itself as a trusted source for through-hull and marine plumbing components among vessel owners and marine builders. The HTH-625-S represents the brand's commitment to engineering fittings that withstand years of saltwater exposure without replacement, reducing maintenance downtime and ensuring dependable operation when you're on the water.