What is the weight rating (tensile strength) of the WD chain?

Tensile strength of chain is measured two different ways. Here's the official specs with both tensile numbers: 

  •     3/8" zinc-plated chain
  •     Grade 30 commercial
  •     2650 lbs minimum working load (sometimes called tensile strength) –with 4x breaking strength
  •     Minimum tensile of 55,000 p.s.i. 
     
Weight DistributionAndersen Hitches