Wood Deck Plugs

What Are Wood Deck Plugs?

Wood deck plugs — often called bungs — are small, tapered wooden inserts used aboard boats and other watercraft for two equally important purposes: finishing and safety. On the finishing side, wood deck plugs are set into countersunk screw holes in teak decking, wood trim, and interior millwork to conceal fasteners and deliver a clean, professional look. On the safety side, cone-shaped wood plugs are kept aboard as emergency gear to quickly stop water intrusion through a failed thru-hull fitting or unexpected hull breach.

Why Wood Deck Plugs Matter on the Water

Marine wood deck plugs play a dual role that no serious boater should overlook. For deck finishing, they provide a seamless surface that protects screw heads from corrosion and moisture intrusion — a critical consideration in the harsh saltwater environment. For emergencies, wooden plugs, sometimes called bungs, are available in a variety of shapes and sizes to stop leaks in boats, and experienced mariners recommend tethering the appropriate size plug directly to each thru-hull fitting so it is immediately at hand if needed.

The traditional wood plug works on a simple but effective principle: when driven into a water-filled hole, the wood absorbs moisture, swells, and creates a tight, expanding seal. This low-tech reliability is exactly why wood plugs have remained a staple of onboard safety kits for generations. Keeping an assortment of sizes aboard is considered standard seamanship practice for boats of all sizes, from center consoles to bluewater cruisers.

What to Look for When Buying Wood Deck Plugs

• Size assortment: Thru-hull fittings vary in diameter, so a multi-size pack ensures you have the right plug ready for any fitting on your vessel.
• Wood species and quality: Higher-quality plugs use close-grained hardwoods that expand reliably when wet and resist splitting under mallet pressure.
• Application type: Flat-sided or cylindrical plugs work best for countersunk deck screws, while tapered cone plugs are the correct choice for emergency thru-hull applications.
• Quantity: Safety experts recommend having enough plugs to cover every thru-hull on the boat, plus extras.

Top Brands in Wood Deck Plugs

Whitecap Industries has been engineering marine hardware and teak wood products since the early 1970s, and is recognized as a trusted supplier to OEMs, professional boat builders, and aftermarket boaters alike. Their extensive teak woodworking capabilities make them a natural choice for quality wood deck plugs that deliver a proper fit and clean finish on hardwood decking.

Seachoice launched in 1988 with a focus on marine hardware essentials and has grown to offer over 5,000 marine parts across 17 categories, backed by a no-hassle warranty. Their assorted wood plug packs — spanning sizes from 1/2" to 2" — are a practical, value-driven option for boaters who want a comprehensive emergency kit in a single purchase.