The Mad Hatイカれ帽子

A once-ordinary hat now stuffed with scribbled notes, maps, and theories about the underground. Listen closely, and it might just share a helpful hint or two.
In-game description

What is The Mad Hat? Features and uses

The Mad Hat is an uncommon item in Core Keeper (Helmets).

The Mad Hat key points (from the game data)

Durability: 90. Reinforcing it at the Salvage and Repair Station doubles durability.
Sells to merchants for 7 Ancient Coins.

Calculated and summarized by this site from the game data (1.3.0.6).

What you get from salvaging The Mad Hat (Salvage and Repair Station)

The Mad Hat can be salvaged. Salvaging it gives the following items.

For each material, the amount is "amount used to craft × 0.49 (lower when durability is down, 0.3 at 0 durability) × the item's multiplier", and a fraction is the chance of one more (2.4 means 2, with a 40% chance of 3). The range is from 0 durability to full durability (items without durability always count as full). Scrap parts are a fixed number set by the item level. All items that can be salvaged are listed in salvaging.

How to get The Mad Hat

Placed in or on the Pedestal found inside a scene (building, ruin, camp and so on) (guaranteed)Where: Mad Hat Camp [The Clay Caves] (0–1 per world)

Scene containers, dungeon placements, guaranteed drops and natural spawns are based on the Obtaining data of the Core Keeper Wiki (Fandom) (CC BY-SA 3.0), because these are not in the game files this site reads. Scene names are the wiki's English names.