National Pipe Thread is a U.S. standard for tapered (NPT) or straight (NPS) threads used to join pipes and fittings. ANSI/ASME standard B1.20.1 covers threads of 60-degree form with flat crests and roots in sizes from Â¹âââ inch to 24 inch Nominal Pipe Size.
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2/26/2014. Merck - I tried the Oxytrol patch and the next day I had a. I tried the Oxytrol patch and the next day I had a red, itchy area on the buttocks where I had applied the patch. There is nothing on the box or the enclosed customer information leaflet that states that this type of reaction would occur. I have tried several times to call the number on the package (800-699-8765) and It just keeps repeating the message and never transfers my call to anyone.