Generally shackles come in 2 grades:

  • Industrial Grade (Type IV A)
  • Specialty Alloy Shackles (Type IV B)

Generally if you are trying to match the strength of your chain you can use these rules:

  • If sizing for BBB or Proof coil chain use Industrial Grade (Type IV A) shackle, one size bigger than your chain
  • If sizing for HT (G4) chain use Specialty Alloy Shackles (Type IV B), one size bigger than your chain
  • If sizing for stainless steel chain use a forged SS shackle that is one size bigger than your chain.
  • If sizing for duplex chain use a duplex shackle one size bigger than you chain
Shackles Tabel
Shackles