Brown Iron Hatch
Press & hold Activate to lock it or set a combination. Upgrade & repair with a construction tool using the secondary action.
Upgrade path
Hit a placed block with a stone axe, claw hammer or nail gun while carrying the material of the next step: 6 hits per upgrade.
Crafting
Craft at Backpack · makes 1
Crafted as Iron Hatch: pick this one of its variants when you place it.
Forged Iron× 10
Harvest drops
Iron× 20-30
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (29 POIs)
Correa Rockworx (tier 5), Hybrid Mining (tier 5), Navezgane Athletics Complex (tier 5), Navezgane County Jail (tier 5), Vanity Tower (tier 5), Calm Inn (tier 4), Don Vittorio Spagetto Residence (tier 4), Fort Choppa (tier 4), Installation Blue Ridge (tier 4), NFD Downtown HQ (tier 4), Pergola Apartments (tier 4), Atlas Metal Company (tier 3), Buy-N-Go Apartments (tier 3), Jim & Tim's Bullets and Booze (tier 3), KZL Radio Station (tier 3), Navezgane Fire District #3 (tier 3), Pass-N-Gas Plaza (tier 3), Ranger Station Alpha (tier 3), BONG Auto Parts Manufacturing (tier 2), NEW Mamma Pizza (tier 2), R. Thornbury Residence (tier 2), Hog Foot Village (tier 1), Mercy Point Camp (tier 1), Ranger Station Beta (tier 1), Ranger Station Charlie (tier 1), The Hinton Residence (tier 1), Kountry Mart, Pristine Healthcare, Shady Rest Area.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.