Sea-Dog 321820-1 Stainless Steel Chain Stopper – For 3/16" to 1/4" Chain

The Sea-Dog 321820-1 Stainless Steel Chain Stopper is a heavy-duty marine accessory designed to securely hold your anchor chain and reduce strain on your windlass while at anchor. Manufactured from investment-cast 316 stainless steel, this corrosion-resistant chain stopper provides dependable performance in harsh saltwater environments.

Designed for 3/16" to 1/4" anchor chain, the 321820-1 is compatible with Sea-Dog bow rollers and many comparable bow roller assemblies. It can be mounted directly to the deck or installed inside most bow rollers, making it a versatile solution for a wide range of recreational and commercial vessels.

By transferring the anchor load from the windlass to the chain stopper, it helps protect your windlass from unnecessary stress, improves anchoring safety, and minimizes chain movement while underway or at anchor.

Features

• Genuine Sea-Dog 321820-1

• Designed for 3/16"–1/4" anchor chain

• Heavy-duty 316 stainless steel construction

• Corrosion-resistant for saltwater environments

• Helps relieve strain on anchor windlass

• Prevents unintended anchor chain movement

• Mounts independently or inside most bow rollers

• Compatible with Sea-Dog and comparable bow rollers

• Uses 5/16" flat head fasteners (not included)

• Ideal for recreational and commercial vessels

Specifications

Applications

Ideal for:

• Anchor windlass systems

• Powerboats

• Sailboats

• Fishing boats

• Cabin cruisers

• Offshore vessels

• Commercial boats

• Recreational boating

• Replacement chain stopper installations

Benefits

✔ Reduces strain on your anchor windlass

✔ Securely locks the anchor chain in place

✔ Durable marine-grade 316 stainless steel

✔ Excellent corrosion resistance

✔ Easy installation

✔ Compatible with Sea-Dog and most comparable bow rollers

✔ Improves anchoring safety and reliability

Package Includes

• 1 × Sea-Dog 321820-1 Stainless Steel Chain Stopper

• Installation Instructions

Mounting hardware not included.