Let's now talk about boat screws and bolts , a fundamental element for the safety and reliability of the vessel, especially in a marine environment where oxidation is a constant risk.

⚙️ Types of Boat Screws and Bolts

1. Recommended Materials

• AISI 316 stainless steel (marine)
• AISI 304 : good, but less resistant to marine corrosion (more suitable for interiors).
• Bronze or brass : used for electrical or plumbing systems.
• Bronze or brass : used for electrical or plumbing systems.

2. Types of Screws and Bolts

• Countersunk screws For flush surfaces, e.g. teak decking.
• Pan head screws Good for joining mechanical parts.
• Bolts with nut Structural connections (e.g. chainplate, bollards).
• Self-tapping stainless steel For fixing on fiberglass, wood or metal.
• Stainless steel metric screws With continuous thread, for precise assembly.
• Parker screws For quick fastenings in wood.

🧰 Related Accessories

• Flat washers and growers : distribute the load, prevent loosening.
• Self-locking nuts (Nyloc) : resist vibrations.
• Threaded Inserts : For creating solid threads on fiberglass.
• Sealants/anti-seize agents (e.g. Tef-Gel, Loctite): prevent oxidation and seizure.

✅ Helpful Tips

1. Do not mix stainless steel with unprotected aluminum → risk of galvanic corrosion.
2. Periodically check bolts under load (e.g. shroud attachments, cleats, pulpits).
3. Always keep a supply of stainless steel screws of various sizes on board.