In 1755, having risen to be a mate, Cook joined the Royal Navy, and after four years' service was, on the recommendation of Sir Hugh Palliser, his commander, appointed master successively of the sloop Grampus, of the Garland and of the Solebay, in the last of which he served in the St. Lawrence.
Tap Bolt vs Cap Screw. What is the difference between a tap bolt and a cap screw? A tap bolt is (typically) a fully threaded hex bolt, while a cap screw is (typically) a hex head bolt that will be installed by turning the head of the bolt (screw) instead of tightening it with a nut.
Screws have threads and bolts sometimes do and sometimes don't have threads. Screws join things together, wood or metal or plastic. Bolts have a nut on the other end and may use washers or spacers. Bolts need a hole drilled for them, a screw may not if it is self tapping.