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Amazon.com: NPT Thread Forming Taps - 5 Pieces 1/8", 1/4", 3/8", 1/2", 3/4" Pipe Taps Set with Storage Box Drill Bits for Cleaning or Re-thread Damaged or Jam Pipe Threads, High-speed Steel
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OSG - Standard Pipe Tap: 1/4-18, NPT, 4 Flutes, Vanadium High Speed Steel, TiN Finish - 70853304 - MSC Industrial Supply
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XtremeAmazing Set of 5 HSS NPT Pipe Tap Set 1/8, 1/4, 3/8, 1/2 and 3/4 Inch: Amazon.com: Industrial & Scientific
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Amazon.com: IRWIN NPT Tap for Tap Die Extraction, 1/4-Inch, 18 NPT(1903ZR) : Industrial & Scientific
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HORUSDY 5 Pcs NPT Pipe Tap Set 1/8" 1/4" 3/8" 1/2" and 3/4" With Case Carbon Steel Inch - Walmart.com
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