Seadog - Locking Hose Deck FillsLocking Hose Deck Fills prevent fuel theft and include two keys. These Locking Hose Deck Fills feature a locking cap to prevent fuel theft. Cap spins freely when in the locked position. To unlock the cap, turn key until key hole is inline with the cap tabs (shown in photo). Cap diameter 2 1 8", thread pitch 11 1 2 NPSM straight. Color coded with international symbols for easy deck fill identification. Includes two keys and cap attachment cable.