#4 Bronze Flat Head Wood Screws
#4 Silicon Bronze Wood Screws
651 Silicon Bronze #4 Screws
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#4 Silicon Bronze Wood Screws

Part Number: SB-WS-SL-FL-4x1/2

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#4 Silicon Bronze Wood Screws, Flat Head, Slotted Drive 

These Silicon Bronze wood screws are the highest quality available. We carry them in a variety of sizes and lengths, and with Flat Heads, Oval Heads, in Frearson Drive, and in Slotted Drive.

#4 Wood Screw Dimensions:
 Head Diameter (Imperial) Head Diameter (Metric) Shank Diameter (Imperial) Shank Diameter (Metric)
0.199" (~13/64") 3.02mm 0.112" (~7/64") 2.84mm

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 59 reviews
Fast and exactly what I ordered.

The order process was straightforward, and the turn-around time was short. The screws are exactly the silicon bronze i needed.

Jeffrey Tam
Bronzed Screws from Fair Wind Fasteners

Sent an order to Fair Winds Fasteners which had various sizes and numbers of bronze screws; from just 3 of on size to 20 of another. The order was filled and shipped quickly at a good price.

Great Service Great Delivery

Restoring JB Arnold Canoe needed quality #4 bronze screws company great to deal with
Thanks for exceptional customer service

Bronze screws

The screws I ordered seem to be very high quality and so far have not broken when installed into white oak. I of course predrilled every screw hole before installation.

Andrew Creed

High quality. Very satisfied.