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techtalk:ref:tools810 [2021/01/21 19:07]
hippysmack [Brake Line Threads] 		techtalk:ref:tools810 [2021/01/27 23:33]
hippysmack removed
Line 70: Line 70:
 It will catch the first thread, making you think that it will go in, but it will destroy the threads as you tighten it. \\  It will catch the first thread, making you think that it will go in, but it will destroy the threads as you tighten it. \\ 
  
 +====== Thread Tap and Drill sizes ======
 +
 +===== NPT ===== 
 +    * Pipe threads come either straight (nps) or tapered (npt). ​ ((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +
 +    * Both are based on the pipe outside diameter as follows:
 +    * 1/8 pipe = .405 pipe dia.  ((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +
 +    * 1/4 pipe = .540 dia.  ((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +
 +    * 3/8 pipe = .675 dia.  ((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +
 +    * The above sizes are the major dia of the male straight thread (as the pipe od is the major) and major dia. of tapered male thread at its big end (if fitting is made to the americian standard). ((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +    * The tapered thread has diameter reduced on a taper of .0625 per inch of thread length. Almost all hardware store fittings will be tapered thread.((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +
 +    * Little known fact: All iron heads pipe threads used in cases, rocker boxes, and oil pumps are straight female thread, fitted with tapered thread male fittings.((DR DICK of the XLFORUM ​ http://​xlforum.net/​forums/​showthread.php?​t=1810036&​highlight=tap+die&​page=2))
 +
 +===== NPSC Tap Drill Sizes =====
 +
 +^Tap / Thread Size  ^Drill Size ((Starrett tap drill sizes chart)) |
 +|1/​8-27 ​ |11/​32 ​ |
 +|1/​4-18 ​ |7/16  |
 +|3/​8-18 ​ |37/​64 ​ |
 +|1/​2-14 ​ |23/​32 ​ |
 +|3/​4-14 ​ |59/​64 ​ |
 +
 +===== AN Thread Sizes =====
 +
 +AN (or Army/Navy) was never intended to characterize an entire fluid system, and is mostly designed as a thread specification. \\
 +AN sizes range from -2 to -32 in irregular steps, with each step equating to the OD (outside diameter) of the tubing in 1/16" increments. \\ This system does not specify the inside diameter of the tubing because the tube wall can vary in thickness. ((http://​www.anfittingsdirect.com/​an-fittings-and-stainless-steel-lines-a-an_fittings_sizes.html)) \\
 +
 +^AN Size^Metal Tube OD^SAE Thread Size ((info provided by 4th of July of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1923879)) ^
 +|3|3/​16"​|3/​8"​-24|
 +|4|1/​4"​|7/​16"​-20|
 +|5|5/​16"​|1/​2"​-20|
 +|6|3/​8"​|9/​16"​-18|
 +|8|1/​2"​|3/​4"​-16|
 +|10|5/​8"​|7/​8"​-14|
 +|12|3/​4"​|1-1/​16"​-12|
 +|16|1"​|1-5/​16"​-12|
 +
 +
 +\\
 +
 +===== SAE and Metric Tap Drill Sizes =====
 +
 +Below are standard pre-drill sizes for size taps used. These are common drill sizes and they are sufficient for most applications on a Sportster. ((Starrett tap drill sizes chart unless otherwise noted))
 +
 +^  SAE Tap  ^  Drill Size  ^  Drill Bit  | ^  Metric Tap  ^  Drill Bit  |
 +^  Thread size   ​^ ​ #/​Letter ​ ^  Diameter- in  | ^  Thread Size  ^  Diameter- mm / in  |
 +|6x32  |  36  |0.1065"​ ^ |M3 x 0.5 |2.50 mm / 0.0984" ​  |
 +|#​6x40 ​ |  33  |0.1130" ​ ^ |M3.5 x 0.6 |2.90 mm / 0.1142" ​  |
 +|#8x32 \\ #8-36  |  29  |0.1360" ​ ^ |M4 x 0.7 |3.30 mm / 0.1299" ​ |
 +|#​10x24 ​ |  25  |0.1495" ​  ^ |M4.5 x 0.75 |3.70 mm / 0.1457" ​  |
 +|#​10x32 ​ |  21  |0.1590" ​  ^ |M5 x 0.8 |4.20 mm / 0.1654" ​  |
 +|#​12x24 ​ |  16  |0.1770" ​  ^ |M6 x 1 |5.00 mm / 0.1968" ​ |
 +|#​12x28 ​ |  14  |0.1820" ​  ^ |M7 x 1 |6.00 mm / 0.2362" ​ |
 +|1/​4"​x20 ​ |  7  |0.2010" ​  ^ |M8 x 1.25 |6.70 mm / 0.2638" ​ |
 +|1/​4"​x28 ​ |  3  |0.2130" ​  ^ |M8 x 1 |7.00 mm / 0.2756" ​ |
 +|5/​16"​x18 ​ |  F  |0.2570" ​ ^ |M10 x 1.5 |8.50 mm / 0.3346" ​ |
 +|5/​16"​x24 ​ |  I  |0.2720" ​ ^ |M10 x 1.25 |8.70 mm / 0.3425" ​ |
 +|3/​8"​x16 ​ |  5/16  |0.3125" ​ ^ |M12 x 1.75 |10.20 mm / 0.4016" ​ |
 +|3/​8"​x24 ​ |  Q  |0.3320" ​ ^ |M12 x 1.25 |10.80 mm / 0.4252" ​ |
 +|7/​16"​x14 ​ |  U  |0.3680" ​ ^ |M14 x 2 |12.00 mm / 0.4724" ​ |
 +|7/​16"​x20 |  25/64  |0.3906" ​ ^ |M14 x 1.5 |12.50 mm / 0.4921" ​ |
 +|1/​2"​x13 ​ |  27/64  |0.4219" ​ ^ |M16 x 2 |14.00 mm / 0.5512" ​ |
 +|1/​2"​x20 ​ |  29/64  |0.4531" ​ ^ |M16 x 1.5 |14.50 mm / 0.5709" ​ |
 +|9/​16"​x12 ​ |  31/64  |0.4844" ​ ^ |M18 x 2.5 |15.50 mm / 0.6102" ​ |
 +|9/​16"​x18 ​ |  33/64  |0.5156" ​ ^ |M18 x 1.5 |16.50 mm / 0.6496" ​ |
 +|5/​8"​x11 ​ |  17/32  |0..5312" ​ ^ |M20 x 2.5 |17.50 mm / 0.6890" ​ |
 +|5/​8"​x18 ​ |  37/64  |0.5781" ​ ^ |M20 x 1.5 |18.50 mm / 0.7283" ​ |
 +|3/​4"​x10 |  21/32  |0.6562" ​ ^ | 
 +|3/​4"​x16 |  11/16  |0.6875" ​ ^ |
 +|7/​8"​x9 ​ |  49/64  |0.7656" ​ ^ |
 +|7/​8"​x14 |  13/​16" ​ |0.8125" ​ ^ |
 +|1"​x8 ​ |  7/​8" ​ |0.8750" ​ ^ |
 +|1"x12 |  59/​64" ​ |0.9219" ​ ^ |
 +|1"x14 |  15/16  |0.9375" ​ ^ |
  
  

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