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.
Taps are also used to cut threads into a hole, so that they will receive a bolt more effectively. There are different types of thread taps that are used for a variety of reasons and purposes. Below are some of the most common types of thread taps and their basic description: 1  Straight flute taps. 2  This particular type of tap is the most affordable and the simplest type of tap.