I received my Garmin pitot tube and was working on marking the four drilling points on the pitot mast that will hold the pitot tube to the mast. I was also looking thru my stock of 6-32 countersunk screws as I will need 4 screws in the 1/4" length for this fastening job...but the shortest I have is 1/2". I ran up to the Ace hardware and they didn't have anything shorter than 1/2" either. Amazon has them, but I have to buy 100 screws... they are only $8.00 for 100, but I really didn't want to become the southwest distributor for 1/4" 6-32 stainless steel countersunk screws...