Dock Washers

Dock Washers are large-diameter round washers, similar in appearance to flat and fender washers, but designed with a smaller center hole for secure bolt engagement. Known for their extra-thick gauge—typically ¼ inch across most sizes—these washers are engineered to handle heavy-duty load-bearing applications, offering enhanced strength and surface load distribution.

Adfast Component manufactures dock washers in both metric and imperial dimensions, with options for custom thicknesses up to 5/8 inch based on application needs. Common material choices include zinc-plated steel, plain carbon steel, and stainless steel, ensuring durability and corrosion resistance for demanding environments.

Specifications

FormingHot & Cold Forged
Metric SizeM6 to M100
Imperial Size1/4″ to 4″
Threads 
StandardsDIN, ASME, ISO & IS
Variants 
Dimension StandardsNo specific standard available. Can be customized as per request.
Materials 
ASTM Specifications
ASTM A36ASTM A167ASTM A240
ASTM A283ASTM A387ASTM A516
ASTM A572ASTM A829ASTM A633
ASTM A656ASTM B127ASTM B162
ASTM B171ASTM B209ASTM B424
ASTM B463ASTM B551ASTM B749
ASTM B755  
Coatings