Differences

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--- techtalk:ref:tools032 [2021/07/10 01:26]
hippysmack [REF: Thread Identification and Sizing Charts]
+++ techtalk:ref:tools032 [2022/03/27 07:38]
hippysmack [Metric Nut/Bolt Threads]
@@ Line 6: / Line 6: @@
 \\
 ====== 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 25: / 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 43: / 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 59: / 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 76: / 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. \\
@@ Line 111: / 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 138: / Line 174: @@
     * 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 174: / 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"|9/32"|

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