Nylon 3-Strand Anchor Lines - Miami Cordage


Miami Cordage manufactures our own 3-strand twisted anchor lines from premium nylon fibers, these are domestic anchor lines and designed to last over time unlike most comparable imports. Standard diameters and lengths are in stock, all diameters and lengths are available on request. Chafe gear at the throat will also help to protect your lines from fray.


  • Eyes are hand spliced with 5 tucks around a stainless steel or galvanized thimble
  • Incredibly strong with controlled elongation and resistant to UV damage
  • Available in black and white, additional colors available on special order
Part # Nominal Diameter Circ
Wt/100 ft
Inch MM
AL38 3/8 10 1-1/8 3,700 3.50
AL716 7/16 11 1-1/4 4,800 5.10
AL12 1/2 13 1-1/2 6,400 6.30
AL58 5/8 16 2 10,400 10.50
AL34 3/4 19 2-1/4 13,800 14.50
AL78 7/8 22 2-3/4 20,000 20.00
AL1 1 25 3 25,000 26.40
AL114 1-1/4 32 3-3/4 37,500 40.00
AL112 1-1/2 38 4-1/2 53,000 55.00
AL2 2 50 6 90,000 95.00


Compliance to the above specifications is based upon testing according to the Cordage Institute Standard Testing Methods for Fiber Rope and/or ASTM D-4268 Standard Methods of Testing Fiber Ropes.

Weights: Are average and may vary +/- 5%.

Tensile strengths: Are approximate average for new, unused ropes. To estimate the minimum tensile strength of a new rope, reduce the approximate average by 15% (Cordage Institute defines minimum tensile strength as two standard deviations below the average tensile strength of the rope).

Nylon rope has three characteristics that make it ideal for dock line. Nylon rope is incredibly strong, it is very stretchy, and it resists the harmful effects of sunlight better than any of those fancy-name synthetics.

Nylon ropes value of strength is self-evident, but the benefits of elasticity may not be as obvious. When your boat surges against an unyielding dock line, the load on the line goes from zero to the maximum at the instant the nylon line comes taut. The likely consequence is a broken line-not unlike how you might snap a piece of thread with a jerk. Even if the nylon rope is strong enough not to break, it is hammering cleats and bitts with every surge. Nylon rope doesn’t come taut suddenly, but dissipates the load by stretching. It is like the difference between hitting the steering wheel or hitting the air bag.

As for nylon rope’s resistance to ultraviolet damage, dock lines, particularly permanent dock lines, live in the sun. Nylon lines enjoy a much longer life than other lines in that environment.