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.
After using both kind of taps for a while, youâll see the difference in looks right away. A cut tap doesnât have a full thread until about the third time around, while a form tap looks the same from bottom to top. A cut tap also has clearance cut around the tool so that chips will move out of the way and not break it.