Generally
Threaded plug with square head, conical NPT thread that seals the threads. The measurement stated is the outer diameter of the gangs.
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Threaded plug Square skull
25 kr – 65 kr
Tip!
If you want, you can brush on a thin layer of gasket adhesive on the joints before installing the plug. But it often seals anyway, because the gang is conical.
National Pipe Thread is an American standard that includes tapered and straight threads. NPT are the conical threads, where the T in the abbreviation stands for tapered (conical), and NPS the straight (straight). NPT threads all have the same taper, 3/4 inch per foot. Pipes and fittings with this type of thread are found primarily in sizes from 1/8 inch up to and including 2 inches.
