Washers are used to create a secure and strong fastener hold, spread clamping force, and prevent fastener loosening or back out.
Marine-grade washers are a key component in boat building, generally used around a bolt or a screw to form a seat for the head or nut. We stock a wide variety of fasteners in different sizes and metals for your every boat building need.
Our complete line of washers and other fasteners is available online, with a large number of styles, shapes, sizes, and metals. We offer flat, dock, fender, lock, finish, metric, internal and external tooth, copper burr, and copper rove style washers. Many are available in different metals, ranging from stainless steel to copper to galvanized to silicon bronze and brass. Standard (inch-based) and metric sizes are available.
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Flat Washer - The most common type of washer, used to distribute the force/stress of a nut or bolt. Can also help reduce friction and heat when turning a bolt or nut. Basic flat style washers are available in stainless steel, brass, galvanized, and silicon bronze. |
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Dock Washer - Also used to distribute tightening force, but are larger in terms of their outside diameter, and thicker than normal. Available in galvanized. |
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Fender Washer - These feature a larger outer diameter, and are used for distributing force/stress as well. They are available in stainless steel and 316 stainless. |
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Lock Washer - Prevents a nut from loosening by placing tension on it. Lock washers are actually split and slightly coiled, which gives them locking characteristics. Available in standard (inch-based) in galvanized, 316 stainless steel, stainless steel, and silicon bronze, and in metric sizes (stainless steel only). |
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Finish Washer - Finish or Finishing Washers are used mostly for decorative purposes to give projects a 'finished' look. Available in brass or stainless steel, they work best with oval or flat head screws. |
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Pyramid Washer - Zinc-plated, star-shaped, and perfect for use with U-bolts in heavy-duty applications. |
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External Tooth Washer - This locking type washer utilizes external teeth (looks almost like a gear) for tension. Available in stainless steel. |
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Internal Tooth Washer - These washers also feature locking 'teeth', but typically have smaller outer diameters than the external type. Available in stainless steel. |
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Copper Burr - Also known as copper washers, these are often used with copper common nails to create a traditional copper rivet, similar to clinch nailing. Copper rivets are utilized in classic planked wooden boat construction. |
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Copper Rove - Slightly conical washers. To form a copper rivet, a copper nail is hammered through the joint, a rove is pushed over the end (concave side inward) and the nail is peened over. |
Flat Washer Specifications
This guide allows boat builders and woodworkers to match up the correct washer size with the fasteners they are using in terms of inner and out diameter.
