Grenade box (Fallout 3)

Grenade boxes share their appearance with ammunition boxes and mine boxes, but only contain Frag Grenades, Pulse Grenades or Plasma Grenades. They are often found locked.

Boxes with frag grenades
One guaranteed grenade, 75% chance to spawn 2 to 6.
 * Three in the Rock Creek Caverns.
 * Two on shelves, east of the metro in Pennsylvania Avenue, in a trapped super mutant hideout below a building.
 * Two on the second floor of a ruined house, east in the Fairfax ruins.
 * Two on the beam going over two metro trains in Warrington trainyard.
 * Two Average locked boxes north of the exploding scientist truck, next to some wrecked cars and a skeleton.
 * Two in the Grayditch sewer.
 * Two in the Dunwich Building, ground floor.

Boxes with pulse grenades
One guaranteed grenade, 75% chance to spawn 2 to 6.
 * Three in the northeast section of the National Guard depot offices.
 * Two in the back of a blue truck in the Flooded metro raider camp.

Boxes with random grenades

 * Two in the Archival Strongroom, next to the safe holding the Declaration of Independence.

Boxes with plasma grenades
One guaranteed grenade, 75% chance to spawn 2 to 6.
 * Two in Raven Rock Level 1, behind a forcefield on the way out, near the exit.

Appearances
Grenade boxes appear $$