Electrical
Electric Fence Post
Wire up 2 or more of these and shock your enemies.
Repair with Forged Iron and Electrical Parts.
Crafting
Craft at Workbench · makes 1
Harvest drops
Iron× 5-40
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Salvage drops
Extra parts when salvaged with a wrench, ratchet or impact driver.
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.