TRUDESIGN - 90431 - Skin Fitting Domed ¾” BSP PKG- Black

TruDesign 90431 Domed Skin Fitting ¾” BSP (Black)

The TruDesign 90431 is a precision-molded composite domed skin fitting (thru-hull) featuring a ¾” BSP parallel thread. Designed for both above and below the waterline marine applications, this fitting provides a high-strength, corrosion-free passage through wood, aluminum, steel, or composite boat hulls.

Manufactured in New Zealand from high-rigidity, glass-reinforced nylon composite, TruDesign skin fittings eliminate electrolytic corrosion and galvanic stray-current decay—removing the need for bonding wires or zinc anodes. The smooth inner bore minimizes fluid restriction, while the domed exterior outer flange provides a low-drag profile against the hull exterior.

Key Features

• Zero Galvanic Corrosion: Composite construction is impervious to electrolysis, stray current corrosion, and chemical breakdown in saltwater environments.

• Above & Below Waterline Certified: Meets stringent international ISO and ABYC standards for below-the-waterline hull penetrations.

• High Chemical & UV Resistance: Immune to diesel, petrol, bilge cleaners, antifouling paints, and long-term UV degradation.

• Lightweight & High Strength: Glass-reinforced nylon composite offers structural strength comparable to bronze fittings at a fraction of the weight.

• Seamless Thread Engagement: Precision parallel BSP threads mate directly with TruDesign ball valves (seacocks), load-bearing collars, and tail fittings.

Specifications