![]() * Values are calculated for Length of engagement of 5xPitch. (UNR Only) 0.1528 (Ref) 3.881 (Ref) α Varation of 30° anngle (+/-) 1.5 (Ref) 38.1 (Ref) P Varation of pitch (+/-) 0.0006 (Ref) 0.015 (Ref) Spiralock Thread Form Taps Contact Details Stanley Engineered Fastening - Spiralock Address 25235 Dequindre Rd. * Permisable values for thread Class 3A # Description Value (Inch) Value (mm) es Allowance 0 (Ref) 0 (Ref) d Major Diameter 0.184 - 0.19 4.674 - 4.826 d 2 Pitch Diameter 0.1675 - 0.1697 4.255 - 4.31 d 3 Minor Diameter The desired thread is formed in the metal under pressure and the grain fibers, as in good. Buy 5 Piece NPT Thread Forming Taps, Pipe Taps Set, High-speed Steel Drill Bits for Cleaning or Re-thread Damaged or Jam Pipe Threads, Size 1/8', 1/4', 3/8', 1/2', 3/. For calculations of different engagement length use the Thread Calculator As the name suggests, cutting taps produce threads by progressively cutting away the space between threads into which the fasteners external threads will fit. Internal threads can be produced by a cold forming or swaging process. ![]() ![]() ![]() * Permisable values for thread Class 2A # Description Value (Inch) Value (mm) es Allowance 0.0009 (Ref) 0.023 (Ref) d Major Diameter 0.1831 - 0.1891 4.651 - 4.803 d 2 Pitch Diameter 0.1659 - 0.1688 4.214 - 4.288 d 3 Minor Diameter Taps have a TiCN coating for tapping with coolant.HP-RZ Roll taps can be run 2 times faster than the tapping speeds recommended for thread cutting taps. ![]()
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