Adamantite nails are a type of nail in RuneScape. They are made with an adamantite bar on an anvil with a hammer in the player's inventory, requiring level 74 in smithing and receiving 15 adamantite nails and 62.5 Smithing experience per bar. They can be used to construct certain types of wooden furniture.
Fifteen adamantite nails are used in crafting a red d'hide shield, alongside a magic shield and two pieces of red dragon leather, requiring 76 Crafting and granting 156 experience.
In addition, they are used on flighted ogre arrows to create adamant brutal arrows, requiring 62 Fletching and granting 10.2 experience per arrow.