Dreadnaught Helmet

The Dreadnaught Helmet is the Tier 3 plate head armor for warriors and gives bonuses to strength, stamina, dodge, and overall defense. It is available through quest items in Naxxramas.

Source
The Dreadnaught Helmet is a quest reward from the quest Dreadnaught Helmet (quest) which starts with Korfax in Light's Hope Chapel in Eastern Plaguelands. To complete the quest, you must turn the following items to Korfax:
 * 1 Desecrated Helmet
 * 15 Wartorn Plate Scraps
 * 5 Arcanite Bars
 * 1 Nexus Crystal