Differences

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--- techtalk:ref:tools032 [2021/02/21 00:02]
hippysmack [Common Brake Line Threads]
+++ techtalk:ref:tools032 [2022/03/27 07:38]
hippysmack [Metric Nut/Bolt Threads]
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
-====== REF: Thread Identification and Sizing Charts ======
+====== REF: Tools & Fasteners ======
+====== Thread Identification and Sizing Charts ======
 \\
 ====== Measuring Threads In General ======
+**Thread TPI or Pitch**: \\
 You can purchase a cheap template with different size threads to size screws/bolts or go by your local hardware store to use theirs. \\
 But you don't really need one to accurately find the size of most bolts or thread patterns. \\
@@ Line 23: / Line 25: @@
 You can buy tap/drill and metric conversion charts pretty cheap online or at some bolt or hardware stores. \\
 Then hang them up in your shop where you can always find them when needed. \\
+**Bolt/Screw Length**: \\
+Length is measured from the very end of a bolt/screw to where the fastened surface is assumed to be. \\
+Panhead screws / hex bolts / cap screws etc. are measured from under the head to the end. \\
+Flat head screws, tapered shanks under the head, are measured for overall end to end length (head is assumed to end flush with fastened piece). \\
+|  Measuring length ((composite of photos used with permission))  |
+|{{:techtalk:ref:tools:measuring_different_type_bolts_or_screws.jpg?direct&300|}}|
 |SAE thread gauge: ((photos by Hippysmack))||Tap/drill and metric conversion charts.|
@@ Line 41: / Line 51: @@
 You can download full size charts from the net if needed. \\
 These are just for quick reference. \\
+====== Pitch to TPI Conversion Table ======
+The table below is a reprint from THA ((https://traininghandsacademy.com/wp-content/uploads/2020/11/Pitch-mm-to-TPI-inches-Conversion-Table.pdf)) \\
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&600|}}||||||
+|  MM per thread (Pitch) = Threads per inch (TPI)  ||||||
+|Pitch (mm)|Pitch (in)|Treads Per Inch|Pitch (mm)|Pitch (in)|Treads Per Inch|
+|0.2|0.0079|127.00|1.25|0.0492|20.32|
+|0.25|0.0098|101.60|1.5|0.0591|16.93|
+|0.3|0.0118|84.67|1.75|0.0689|14.51|
+|0.35|0.0138|72.57|2.0|0.0787|12.70|
+|0.4|0.0157|63.50|2.5|0.0984|10.16|
+|0.45|0.0177|56.44|3.0|0.1181|8.47|
+|0.5|0.0197|50.80|3.5|0.1378|7.26|
+|0.6|0.0236|42.33|4.0|0.1575|6.35|
+|0.7|0.0276|36.29|4.5|0.1772|5.64|
+|0.75|0.0295|33.78|5.0|0.1969|5.08|
+|0.8|0.0315|31.75|5.5|0.2165|4.62|
+|1.0|0.0394|25.40|6.0|0.2362|4.23|
 ====== US Nut/Bolt Threads ======
@@ Line 57: / Line 87: @@
     * This will give you the TPI (or second number).
-^  US Thread Pitch  |||||||||
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&600|}}|||||||||
+|  US Thread Pitch  |||||||||
 |Bolt (nominal) \\ Diameter|Decimal|TPI \\ (course)|TPI \\ (fine)^  |Bolt (nominal) \\ Diameter|Decimal|TPI \\ (course)|TPI \\ (fine)|
 |**1/4"**|.25"|20|28^  |**3/4"**|.75"|10|16|
@@ Line 74: / Line 105: @@
 The diameter is the outside diameter of the thread peaks. \\
-In this example of a 10mm bolt; M10x1.25x35 states that the diameter of the threads is 10mm, the thread pitch is 1.25mm and it's 35mm long. \\
+In example of a 10mm bolt; M10x1.25x35 states that the diameter of the threads is 10mm, the thread pitch is 1.25mm and it's 35mm long. \\
-|  Metric Thread Pitch  ||||
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&600|}}|||||
-|Bolt Diameter|Standard Thread Pitch (mm)|Fine Thread Pitch (mm)|Extra Fine Thread Pitch (mm)|
+|  Metric Thread Pitch  |||||
-|**4mm**|0.70|  -  |  -  |
+|Thread OD \\ Metric|Thread OD \\ Inches (app)|Standard \\ Pitch (mm)|Fine \\ Pitch (mm)|Extra Fine \\ Pitch (mm)|
-|**5mm**|0.80|  -  |  -  |
+|**4mm**|0.157"|0.70|  -  |  -  |
-|**6mm**|1.00|  -  |  -  |
+|**5mm**|0.197"|0.80|  -  |  -  |
-|**7mm**|1.00|  -  |  -  |
+|**6mm**|0.236"|1.00|  -  |  -  |
-|**8mm**|1.25|  1.00  |  -  |
+|**7mm**|0.275"|1.00|  -  |  -  |
-|**10mm**|1.50|  1.25  |  1.00  |
+|**8mm**|0.315"|1.25|  1.00  |  -  |
-|**12mm**|1.75|  1.50  |  1.25  |
+|**10mm**|0.394"|1.50|  1.25  |  1.00  |
-|**14mm**|2.00|  1.50  |  -  |
+|**12mm**|0.472"|1.75|  1.50  |  1.25  |
-|**16mm**|2.00|  -  |  -  |
+|**14mm**|0.551"|2.00|  1.50  |  -  |
-|**18mm**|2.50|  -  |  -  |
+|**16mm**|0.630"|2.00|  -  |  -  |
-|**20mm**|2.50|  -  |  -  |
+|**18mm**|0.708"|2.50|  -  |  -  |
-|**24mm**|3.00|  -  |  -  |
+|**20mm**|0.787|2.50|  -  |  -  |
+|**24mm**|  |3.00|  -  |  -  |
+**Methods of measuring in pics**: \\
+Metric screw thread OD can be deduced by using an imperial (US) scale caliper using the chart above. \\
+Your measurements may not be an exact match to the dims above but will be close enough to make a judgement on the metric counterpart size. \\
+{{:techtalk:ref:tools:measuring_metric_screw_threads_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) {{:techtalk:ref:tools:measuring_screw_pitch_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) \\
 ====== Common Brake Line Threads ======
 Most brake systems use flared fittings since they have strong metal to metal connections. \\
 There are two types of brake flare fittings used in brake systems, 37° and 45°. ((https://toolshungry.com/bubble-flare-vs-double-flare-for-brake-lines/#:~:text=It%E2%80%99s%20also%20known%20as%20the%20inverted%20flare%2C%20which,risk%20of%20brake%20failure%20due%20to%20the%20leakage.)) \\
 ° brake line flares are the most commonly used in all kinds of vehicles (using double flared or bubble flared tubing). \\
-AN or JIC fittings require 37° flared fittings. \\
+AN or JIC fittings require 37° flared tubing. \\
 **Single flared lines should not be used in brake systems**. \\
@@ Line 109: / Line 146: @@
 It will catch the first thread, making you think that it will go in, but it will destroy the threads as you tighten it. \\
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&600|}}|||
 |  Thread Conversion Comparisons  |||
 |Thread Size|Metric Diameter|Metric Thread Pitch|
@@ Line 115: / Line 153: @@
 |7/16" x 24|11.1125mm|1.05833333mm|
 |M12 x 1.0|12mm|1.0mm|
 ====== NPT Pipe Threads ======
  NPT stands for National Pipe Thread. Descriptions are commonly used as either straight (NPS) or tapered (NPT). ((DR DICK of the XLFORUM  http://xlforum.net/forums/showthread.php?t=1810036&highlight=tap+die&page=2)) \\
-Pipe thread sizes do not refer to any physical dimension. \\ NPT has flattened peaks and troughs where BSP is rounded. NPT has a thread angle of 60º where BSP is 55º. \\
+Pipe thread sizes do not refer to any physical dimension. \\
+NPT has flattened peaks and troughs where BSP is rounded. NPT has a thread angle of 60º where BSP is 55º. \\
+NPT threads are tapered to create an interference fit and often use thread tape or thread sealant to form a liquid tight seal without using washers, O-rings or gaskets. \\
 There is no direct naming relationship between the measured diameter of NPT pipe threads and the corresponding NPT size. \\
@@ Line 134: / Line 172: @@
     * The sizes in the chart below are the major dia of the male straight thread (as the pipe OD is the major). \\ And the major dia. of a tapered male thread at it's big end. ((DR DICK of the XLFORUM  http://xlforum.net/forums/showthread.php?t=1810036&highlight=tap+die&page=2))
-    * The tapered thread has it's 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))
+    * The tapered thread has it's 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))
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&600|}}||||
 |Nominal pipe \\ size (NPT) \\ (male threads)|Threads \\ per inch|Actual outside \\ diameter, (OD)||
 |:::|:::|Inch|MM|
@@ Line 152: / Line 191: @@
 {{:techtalk:ref:tools:measuring_fitting_tpi_by_hippysmack.jpg?direct&300|}} {{:techtalk:ref:tools:measuring_fitting_tpi-2_by_hippysmack.jpg?direct&300|}} ((photos by Hippysmack)) \\
-====== JIC Flared Fitting Threads ======
+====== AN and JIC Flared Fitting Threads ======
+==== AN ====
+AN (or Army/Navy) was never intended to characterize an entire fluid system, and is mostly designed as a thread specification. \\
+AN fittings are flared fittings with a 37° chamfer seating surface and straight threads. \\
+They can also be reused many times unless the seats are damaged. \\
+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)) \\
+  * You can measure male AN or JIC threads by either using a caliper or simply laying a fitting across a tape measure. \\ Measure the OD of the threads and count the number of threads per inch to confirm with the chart below. \\ Thread OD will not exactly match the SAE thread size but will get you close enough if you have a AN fitting.
+==== JIC ====
 JIC (Joint Industry Council) fittings are flared fittings with a 37° chamfer seating surface and straight threads. ((https://www.hydrauliconline.com/hydraulic-hose-fittings/what-is-a-jic-fitting/)) \\
 The JIC fitting uses it's flared seating surface to seal, instead of an O-ring that could corrode or NPTF fittings. \\
@@ Line 164: / Line 211: @@
   * You can measure male JIC threads by either using a caliper or simply laying a fitting across a tape measure. \\ Measure the OD of the threads and count the number of threads per inch to confirm with the chart below. \\ Thread OD will not exactly match the SAE thread size but will get you close enough if you have a JIC fitting.
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&600|}}|||||
 |JIC Size|AN Size|Thread \\ Size|Male \\ Thread O.D.|Female \\ Thread O.D|
-|1/8"|-2|5/16"-24|5/16" (.31")|9/32" (.27")|
+|1/8"|-2|5/16"-24|5/16"|9/32"|
-|3/16"|-3|3/8"-24|3/8" (.38")|11/32" (.34")|
+|3/16"|-3|3/8"-24|3/8"|11/32"|
-|1/4"|-4|7/16"-20|7/16" (.44")|13/32" (.39")|
+|1/4"|-4|7/16"-20|7/16"|13/32"|
-|5/16"|-5|1/2"-20|1/2" (.50"|15/32" (.45")|
+|5/16"|-5|1/2"-20|1/2"|15/32"|
-|3/8"|-6|9/16"-18|9/16" (.56")|17/32" (.51")|
+|3/8"|-6|9/16"-18|9/16"|17/32"|
-|1/2"|-8|3/4"-16|3/4" (.75")|11/16" (.69")|
+|1/2"|-8|3/4"-16|3/4"|11/16"|
-|5/8"|-10|7/8"-14|7/8" (.88")|13/16" (.81")|
+|5/8"|-10|7/8"-14|7/8" |13/16"|
-|3/4"|-12|1-1/16"-12|11/16" (1.06")|1" (.98")|
+|3/4"|-12|1-1/16"-12|11/16"|1"|
-|7/8"|-14|1-3/16"-12|1-3/16" (1.19")|1-1/8" (1.10")|
+|7/8"|-14|1-3/16"-12|1-3/16"|1-1/8"|
-|1"|-16|1-5/16-12|1-5/16" (1.31")|1-1/4" (1.23")|
+|1"|-16|1-5/16-12|1-5/16"|1-1/4"|
-====== AN Flared Fitting Threads ======
-AN (or Army/Navy) was never intended to characterize an entire fluid system, and is mostly designed as a thread specification. \\
-AN fittings are flared fittings with a 37° chamfer seating surface and straight threads. \\
-They can also be reused many times unless the seats are damaged. \\
-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)) \\
-  * You can measure male AN threads by either using a caliper or simply laying a fitting across a tape measure. \\ Measure the OD of the threads and count the number of threads per inch to confirm with the chart below. \\ Thread OD will not exactly match the SAE thread size but will get you close enough if you have a AN fitting.
-^AN Size^Metal Tube OD^Nearest SAE Thread Size ((Information 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|
 \\

Trace: • REF: Tools - 111 • EVO: Engine Mechanicals - Sub-01K • REF: Body Parts - Sub-51A • 1995 Sportster

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