What is this standard about?
This part of ISO 9093 specifies requirements for metallic through-hull fittings, seacocks and hose fittings that specifically form part of water intake and discharge lines, and for wet exhaust outlets used in small craft of up to 24 m length of hull. Through-hull fittings for other purposes are not covered.
This part of ISO 9093 applies to seacocks and through-hull fittings with cylindrical pipe threads in accordance with ISO 228‑1, and with joints for conical pipe threads in accordance with ISO 7‑1, with nominal diameters of 1/4 in, 3/8 in, 1/2 in, 3/4 in, 1 in, 1 1 /4 in, 1 1 /2 in, 2 in, 2 1 /2 in, 3 in or 4 in.