Read from the World of Warcraft client build files.
How Thranok's Shattering Helm Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Thranok's Shattering Helm suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Similar Items
The 10 items nearest to Thranok's Shattering Helm (item level 40) in item level among Armor > Plate, Head slot, from item level 37 to 44.
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Thranok's Shattering Helm Fits
Other Items Named Thranok's Shattering Helm
6 other items in the current build are also called Thranok's Shattering Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 104990 (104985 to 104995) were usually added in the same batch as Thranok's Shattering Helm: the same quest line, zone, vendor or reward set.