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.
NOTE: The tap drill size of a hole that will be cold form tapped is usually bigger than it cutting tap counterpart. Thread percentage: (77% thread is what you want to use) A 100% thread is 3/4 qtr, or (6/8 th), of the full 60Â° triangle which is the maximum allowed height of a full thread, the V shape, including flats. The UN specification specifies that the common height of a thread should be 5/8 th of this maximum height.