Chinese thread size

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  • cwithboat
    Senior Member
    • Jan 2008
    • 614
    • 47deg54.3'N 122deg34.7'W
    • Craftsman Pro 21829
    #1

    Chinese thread size

    I ordered a basket for my rotisserie on my BBQ. The thumb screws were left out of the shipment, so I called the source and requested screws. I thought, while waiting for a package I would check and see if I could find a match to the basket at the local h/w store. I (and two employees) could not find a screw to fit the threads on the basket. 1/4-20 was too big #10 was too small, 6mm was too big, 5mm too small. The basket was made in PRC. What kind of weird thread sizes do the Chinese use?
    regards,
    Charlie
    A woman is only a woman, but a good cigar is a smoke.
    Rudyard Kipling
    Tags: None
    • LCHIEN
      Super Moderator
      • Dec 2002
      • 21992
      • Katy, TX, USA.
      • BT3000 vintage 1999
      #2
      Almost exclusively metric. Some SAE for export stuff.

      Maybe it was painted after drilling and tapping so the hoel appears to small until you screw thru the paint...

      Ince nothing else has to attach to this hole, I would personally think about drilling the hole one tap size larger and tapping for a (maybe) 1/4-20 SAE thumbscrew or fastener.
      that would take a #7 tap drill or ~13/64" (.201")
      Last edited by LCHIEN; 01-31-2010, 08:24 PM.
      Loring in Katy, TX USA
      If your only tool is a hammer, you tend to treat all problems as if they were nails.
      BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

        Comment

        • guycox
          Established Member
          • Dec 2003
          • 360
          • Romulak, VA, USA.
          #3
          Whitworth? I used to have them on my Austin Healey 100-6 drove me nuts. As I recall a 1/4 w was between a 1/2 and 916 -- almost impossible eyeball it..
          Guy Cox

          Life isn\'t like a box of chocolates...it\'s more like a jar of jalapenos.
          What you do today, might burn your butt tomorrow.

            Comment

            • phi1l
              Senior Member
              • Oct 2009
              • 681
              • Madison, WI
              #4
              Did you try a #12? ... Also there is a coarse & fine thread pitch.
              Last edited by phi1l; 01-31-2010, 09:53 PM.

                Comment

                • cwithboat
                  Senior Member
                  • Jan 2008
                  • 614
                  • 47deg54.3'N 122deg34.7'W
                  • Craftsman Pro 21829
                  #5
                  Originally posted by phi1l
                  Did you try a #12? ... Also there is a coarse & fine thread pitch.
                  Did not try #12. Did not have one at the store. I will have to search around. It is most likely a fine thread. By the time I find a #12 thumb screw maybe I will receive the appropriate ones.
                  Thanks for all the suggestions and advice.
                  regards,
                  Charlie
                  A woman is only a woman, but a good cigar is a smoke.
                  Rudyard Kipling

                    Comment

                    • sscherin
                      Senior Member
                      • Dec 2003
                      • 772
                      • Kennewick, WA, USA.
                      #6
                      Take it to Tacoma Screw..
                      If they don't have it they can find one..
                      90% of the time they will have what you need in stock..
                      If your location is correct the closest one is in Bremerton
                      http://www.tacomascrew.com/locations

                      Beware.. you may end up walking out with a few new screwdrivers.. I always do.. it's like candy!!

                      When it comes to metric there are many pitches.. My Motorcycle has em all.. 1mm,1.25mm 1.5mm
                      Even one little superfine M8x.5mm on the idle screw..
                      Last edited by sscherin; 02-03-2010, 04:47 PM.
                      William's Law--
                      There is no mechanical problem so difficult that it
                      cannot be solved by brute strength and ignorance.

                        Comment

                        • Rich P
                          Established Member
                          • Apr 2003
                          • 390
                          • Foresthill, CA, USA.
                          • Powermatic 66 (1966 vintage)
                          #7
                          If you figure all of their tooling came from the US or Europe (and maybe some old British stuff), they would have learned on and stuck with those standards, at least IMHO. Nowadays they are fooling around with their own "local" technical standards to try to freeze out the ROW, but I don't think they would do this with something as simple as a screw on a barbee.
                          Don't ever ask a barber if you need a haircut.

                            Comment

                            • LinuxRandal
                              Veteran Member
                              • Feb 2005
                              • 4890
                              • Independence, MO, USA.
                              • bt3100
                              #8
                              Rich, you talk about standards, yet there are SEVERAL different bolt standards, and I would LOVE to find a list of them.

                              I believe I found ONE book that covers them (including some of the harder to find automotive ones), but I haven't found it yet.
                              She couldn't tell the difference between the escape pod, and the bathroom. We had to go back for her.........................Twice.

                                Comment

                                • sscherin
                                  Senior Member
                                  • Dec 2003
                                  • 772
                                  • Kennewick, WA, USA.
                                  #9
                                  Metric
                                  http://en.wikipedia.org/wiki/ISO_metric_screw_thread

                                  Whitworth
                                  http://en.wikipedia.org/wiki/BSW

                                  British Standard Fine
                                  http://en.wikipedia.org/wiki/British...rd_Fine_thread

                                  British Standard Cycle
                                  http://homepages.tesco.net/~A10bsa/bscbot.htm

                                  British Association screw
                                  http://en.wikipedia.org/wiki/British..._screw_threads

                                  British standard pipe thread
                                  http://en.wikipedia.org/wiki/British...rd_pipe_thread

                                  NPT
                                  http://en.wikipedia.org/wiki/National_pipe_thread

                                  UNC/UNF/UNEF
                                  http://en.wikipedia.org/wiki/Unified_Thread_Standard
                                  William's Law--
                                  There is no mechanical problem so difficult that it
                                  cannot be solved by brute strength and ignorance.

                                    Comment

                                    • cwithboat
                                      Senior Member
                                      • Jan 2008
                                      • 614
                                      • 47deg54.3'N 122deg34.7'W
                                      • Craftsman Pro 21829
                                      #10
                                      Originally posted by sscherin
                                      Take it to Tacoma Screw..
                                      If they don't have it they can find one..
                                      90% of the time they will have what you need in stock..
                                      If your location is correct the closest one is in Bremerton
                                      http://www.tacomascrew.com/locations
                                      Of course. I should have thought of that immediately. Been there. Done that. Thanks for kicking my brain into gear.
                                      regards,
                                      Charlie
                                      A woman is only a woman, but a good cigar is a smoke.
                                      Rudyard Kipling

                                        Comment

                                        • jking
                                          Senior Member
                                          • May 2003
                                          • 972
                                          • Des Moines, IA.
                                          • BT3100
                                          #11
                                          Originally posted by LinuxRandal
                                          Rich, you talk about standards, yet there are SEVERAL different bolt standards, and I would LOVE to find a list of them.

                                          I believe I found ONE book that covers them (including some of the harder to find automotive ones), but I haven't found it yet.
                                          Machinery's Handbook is the reference I go to when I need to know the specs on a thread. Of course, it costs some serious $$, but, it's not the type of reference the average guy buys just to have around.

                                            Comment

                                            • phrog
                                              Veteran Member
                                              • Jul 2005
                                              • 1796
                                              • Chattanooga, TN, USA.
                                              #12
                                              When I first saw the title of this thread, I thought it had something to do with silk.
                                              Richard

                                                Comment

                                                • LinuxRandal
                                                  Veteran Member
                                                  • Feb 2005
                                                  • 4890
                                                  • Independence, MO, USA.
                                                  • bt3100
                                                  #13
                                                  Originally posted by sscherin
                                                  Metric
                                                  http://en.wikipedia.org/wiki/ISO_metric_screw_thread

                                                  Whitworth
                                                  http://en.wikipedia.org/wiki/BSW

                                                  British Standard Fine
                                                  http://en.wikipedia.org/wiki/British...rd_Fine_thread

                                                  British Standard Cycle
                                                  http://homepages.tesco.net/~A10bsa/bscbot.htm

                                                  British Association screw
                                                  http://en.wikipedia.org/wiki/British..._screw_threads

                                                  British standard pipe thread
                                                  http://en.wikipedia.org/wiki/British...rd_pipe_thread

                                                  NPT
                                                  http://en.wikipedia.org/wiki/National_pipe_thread

                                                  UNC/UNF/UNEF
                                                  http://en.wikipedia.org/wiki/Unified_Thread_Standard
                                                  Originally posted by jking
                                                  Machinery's Handbook is the reference I go to when I need to know the specs on a thread. Of course, it costs some serious $$, but, it's not the type of reference the average guy buys just to have around.

                                                  That book has been on my list for QUITE a while. I am just looking for a bargain (estate/garage sale, etc.).

                                                  The problem, is the weird, J? spec (don't remember the proper term now), where it is used in automotive (odd HEAD size, to threads). It isn't Whitworth (that would be too simple).
                                                  Thankfully, MOST stuff I deal with is pretty standard, either SAE or Metric. It is when you come up with one of these weird things, it can drive you up a wall.
                                                  She couldn't tell the difference between the escape pod, and the bathroom. We had to go back for her.........................Twice.

                                                    Comment

                                                    • sscherin
                                                      Senior Member
                                                      • Dec 2003
                                                      • 772
                                                      • Kennewick, WA, USA.
                                                      #14
                                                      There are dozens of copies up on Ebay..
                                                      24th edition Buy it now $25 shipped
                                                      http://cgi.ebay.com/24th-EDITION-MAC...item439d115583

                                                      Watch out for the ones listing the pocket guide as the full 2700 page book
                                                      Last edited by sscherin; 02-05-2010, 12:14 AM.
                                                      William's Law--
                                                      There is no mechanical problem so difficult that it
                                                      cannot be solved by brute strength and ignorance.

                                                        Comment

                                                        • cwithboat
                                                          Senior Member
                                                          • Jan 2008
                                                          • 614
                                                          • 47deg54.3'N 122deg34.7'W
                                                          • Craftsman Pro 21829
                                                          #15
                                                          Just to put an end to this. It is a #14 fine thread.
                                                          regards,
                                                          Charlie
                                                          A woman is only a woman, but a good cigar is a smoke.
                                                          Rudyard Kipling

                                                            Comment

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