Chain - BBB
Acco Peerless Chain 8611648 5/8" x 200' Long Link Self-Colored Mooring Chain
What Is BBB Chain and Why Does It Matter for Anchoring?
When it comes to keeping your vessel securely anchored, few pieces of gear are as critical — or as misunderstood — as your anchor chain. BBB chain, also known as Triple B or Grade 30 chain, is a purpose-built marine anchor chain that has served as a cornerstone of the anchoring world for decades. Understanding what makes it unique can mean the difference between a peaceful night at anchor and a drifting boat.
Acco Peerless Chain is the most trusted name in this category, offering domestically made BBB chain that meets the precise dimensional requirements boaters depend on.
Understanding BBB Chain: Grade, Construction, and Fit
BBB chain is a Grade 30 chain classified alongside proof coil chain, but with an important distinction: its short, compact links are specifically calibrated for windlass gypsies. While proof coil chain is largely considered non-calibrated for windlass use, BBB's controlled link dimensions allow it to engage smoothly with a windlass wildcat — the toothed wheel that retrieves your rode. This makes BBB a go-to choice for sailors who need a reliable match between their chain and their windlass.
BBB chain is made from low-carbon steel, and its defining characteristic — beyond its calibrated dimensions — is its weight. It is considered the heaviest chain available for a given strength rating. That extra mass is not a disadvantage on a boat; it actually enhances anchoring performance. The weight causes the deployed chain to form a catenary curve, pulling horizontally rather than vertically on the anchor and helping it set firmly against the seabed. Every pound of chain contributes to this effect, making BBB a trusted choice for bluewater cruisers who prioritize holding power.
Most BBB chains are hot-dip galvanized for corrosion protection — a critical feature in saltwater environments. When shopping, verify that any chain you purchase is hot-dip galvanized rather than electro-plated, as the former provides far superior long-term rust resistance.
BBB vs. Other Chain Types: Choosing What's Right for Your Boat
BBB is not the only windlass-compatible chain on the market. High-Test (G43) chain, a heat-treated carbon-manganese alloy, offers a significantly higher working load limit for the same link size — and it is lighter, which can benefit performance-oriented or lighter-displacement vessels. However, BBB and HT chain have different link dimensions, meaning they are not interchangeable on the same windlass gypsy. Always consult your windlass manufacturer's specifications before purchasing any anchor chain. Mixing chain types of the same nominal size is a common and potentially dangerous mistake.
For boaters with older windlasses specifically designed around BBB's dimensions, or for those who prioritize the catenary weight benefits of a heavier rode, BBB chain remains a sound, well-proven choice.
Top Brand: Acco Peerless Chain
Acco Peerless Chain is the standard-setting manufacturer of BBB anchor chain in North America. Their ACCO® BBB Chain is made in the USA and features the short, compact link geometry that makes it ideally suited for windlass applications. Peerless proof-tests their marine chain and can provide certification for every batch they manufacture — a level of quality assurance that serious mariners appreciate. With a hot-dip galvanized finish and a long history of supplying the marine industry, Acco Peerless Chain sets the benchmark for BBB chain quality and reliability.
Key Considerations When Buying BBB Anchor Chain
- Windlass compatibility: Confirm your windlass gypsy is rated for BBB chain specifically — not HT or proof coil.
- Chain size: Chain sizing refers to the wire diameter of the link, not the overall link dimensions. Common marine sizes include 1/4", 5/16", and 3/8".
- Galvanizing: Hot-dip galvanized chain offers superior corrosion protection compared to electro-plated alternatives — essential for saltwater use.
- Inspect regularly: Even quality chain degrades over time in a marine environment. Inspect each link periodically for wear, stretch, corrosion, or deformation, and replace any chain showing signs of damage.
- Length: Plan your chain length based on the depths and conditions where you typically anchor, factoring in the recommended scope for safe holding.