Anchor Chain Fit Key

For specifying your chain size and type so that your windlass will be fitted with the proper wheel.

BBB (3B) = ISO-specification BBB is a low carbon steel, general purpose chain, with a short compact link. The short link is ideally suited for anchor chain. Check fit for windlass manufacturer’s specifications before purchase.
HT = ISO-specification G4-sized hot-galvanized high-carbon steel; high-tensile anchor chain; lighter than BBB; a higher breaking strength threshold than BBB.
PC = Proof coil, low-carbon steel chain; rated breaking strengths similar to 3B; has longer chain links; good for fixed moorings.
SS = ISO-specification G4-sized 316 Stainless Steel anchor chain.