How do you drill a hole in a 1/8 NPT?
There is nothing special about it, except the size of the drill you use to drill the hole. For a 1/8 npt tap requires an “R” drill. Run your tap into the hole to the depth of the threads on the tap. Use a 1/8 fitting as a thread gauge to insure you have enough…
There is nothing special about it, except the size of the drill you use to drill the hole. For a 1/8 npt tap requires an “R” drill. Run your tap into the hole to the depth of the threads on the tap. Use a 1/8 fitting as a thread gauge to insure you have enough threads.Click to see full answer. Also to know is, what size drill bit do I use for a 1/8 NPT tap? Tap size Threads per inch Drill size w/ taper pipe reamer 1/8 27 21/64 1/4 18 27/64 3/8 18 9/16 1/2 14 11/16 Beside above, how do you drill a 1/4 NPT tap? National Pipe Thread Taper ( NPT ) is a U.S. standard for tapered threads used on threaded pipes and fittings . TAPER PIPE SIZES – NPT TAP SIZE DRILL SIZE 1/4-18 7/16 3/8-18 37/64 1/2-14 23/32 Likewise, what size hole do I drill for a 1/4 NPT tap? TAP DRILL SIZE CHART FOR NPT THREADS (National Pipe Threads) NPT Size Tap Drill Size (in.) (Decimal) (in.) 1/4 – 18 7/16 (0.438) 3/8 – 18 9/16 (0.562) 1/2 – 14 45/64 (0.703) 3/4 – 14 29/32 (0.906) How deep should a NPT tap go?To do it right, you need to use a tapered reamer on the holes before you tap them to get a full thread. That’s a tough one. You really need a plug gauge to be accurate. You can get fairly close by going to a depth of about 2/3rd’s of the thread length of the tap.
