1-1/4" NPT HSS Tap Sutton Product Type_Screws 1/2 15pcs QUALITY ASSURED all

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1-1/4" NPT HSS Tap Sutton Product Type_Screws 1/2 15pcs QUALITY ASSURED allTaper thread, National Pipe Thread Taper (NPT), whose diameter increases or decreases along the length of the thread. General purpose use, materials up to approx. 1000 N mm2 Suitable for both hand and machine operations Taper pipe reamer recommended prior to tapping. Threads per inch 11 1 2 Drill diameter 38mm