Trusty cap for driving trains.
The item id for Engineer Hat in unturned is 423. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Clothing
Size_X: 2
Size_Y: 2
Size_Z: 0.35
Armor: 0.9
Blueprints: 2
Blueprint_0_Type: Apparel
Blueprint_0_Supply_0_ID: 423
Blueprint_0_Product: 66
Blueprint_0_Products: 2
Blueprint_0_Build: 32
Blueprint_1_Type: Repair
Blueprint_1_Supplies: 1
Blueprint_1_Supply_0_ID: 66
Blueprint_1_Supply_0_Amount: 2
Blueprint_1_Build: 32