#20 Silicon Bronze Wood Screw
20 Bronze Wood Screw - Large
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#20 Silicon Bronze Wood Screws

Part Number: SB-WS-SL-FL-20x2

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Slotted Drive, Flat Head #20 Silicon Bronze Wood Screws

These Silicon Bronze wood screws are the highest quality available. We carry them in a variety of sizes and lengths.

#20 Wood Screw Dimensions:
 Head Diameter (Imperial) Head Diameter (Metric) Shank Diameter (Imperial) Shank Diameter (Metric)
0.600" (~39/64") 15.21mm
0.312" (~5/16") 7.92mm

What makes our wood screws the best?


Full Body: Our bronze wood screws have a shank diameter that is the same size as the outside of the threads. That means your clearance hole will be completely filled, creating a waterproof seal. Full bodied screws are made from a larger wire stock than screws that aren't full bodied, meaning they are stronger when they hold and stronger when you are driving them in.

Cut Threads: The threads are cut, not rolled. Rolled threads have a reduced shank size, and but ours have a full sized shank and sharper threads. Most other companies produce rolled thread screws and you'll find they twist and break when driving them in, and can leave a compromised fastener in your project without even knowing it.

Cold Pressed Heads: The heads on these screws are cold formed, which hardens them through a process called "work hardening". Experience less stripped screw heads with our cold pressed heads.

Guaranteed 651 Silicon Bronze Alloy: We guarantee that you'll get the correct alloy when you order through us. 651 Silicon Bronze is the ideal alloy for bronze screws in your traditional boat building project, therefore it's the only alloy we will supply our wood screws in. The others may be cheaper, but they're likely not the silicon bronze alloy they claim to be.

Traditional boatbuilders know that there is a glut of imposter alloys and bargain bronze wood screws out there on the market, but Fair Wind Fasteners only supplies Silicon Bronze wood screws of the highest marine grade.

What is a Frearson or Reed & Prince Drive?

Check our wood screw size chart.

Fair Wind Screw Lube



Don't forget to add some Screw Lube to help drive these screws home. Less effort in driving, less stripped heads, and protection from corrosion is right here with Fair Wind Screw Lube - Specifically formulated for boat building!


Customer Reviews

Based on 14 reviews
Thad Van Gilder
High quality wood screws

It never ceases to amaze me the quality of fastener that Fairwind Fasteners provides to their customers. These large wood screws are the best on the market.

Steve R
Very satisfied

Easy to use web site, fast service, found exactly what I wanted, delivered quickly!

Tyson Niles

Easy to navigate site. The fasteners I ordered worked great.

Great Service, Great Product

Made small order online for screws difficult to find anywhere else. Then realized I made several errors in the order. Checked the website for a phone number which was easy to find. The call was cordial and efficient. The product was received exactly on time. The screws are beautiful. I now know where to go for specialty fasteners.

Carlo Cuzzato

A very fast and plain transaction.
Tank you Rob.