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.
RE: Tap Depth Vs Blind hole Depth. 23 Mar 09 15:14. Common rule of thumb is to allow 3 thread pitches extra for the 'tap drill' over the thread depth. Can't recall when or where but someone posted a link or a pdf of common thread tap tools. I have a print off and while it varies a bit it shows about 5 thread pitches deeper.