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unc to metric or imperial

a chart please

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dixie23/03/2011 19:03:17
31 forum posts
Hello. Does any one know of a chart that lists UNC -UNF screws along side
their metric or imperial matches, or has any one an easy way to transpose the same. I am considering making the Snow Engine, the list of fasteners contain many sizes I have not come across and would be a bit tiresome to make, such as
0-80x3/16,1-72x 3/16, 2-56 x1/8 socket head cap screws. Idealy I need a U.K supplier of these sizes all in all there are over twenty different sizes a total of about one hundred and sixty screws.
Brian
Dennis R23/03/2011 20:09:26
76 forum posts
16 photos
Hi Dixie. Try an article in MEW 36, it lists threads by series, outside diameter and TPI. Hope the tables have what you want.
Dennis
JasonB23/03/2011 20:13:13
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25215 forum posts
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About half way down the page these tables gives metric, BA, UNC & UNF
 
 
You are unliekly to get or need for that matter all the different lengths just buy a few lengths of each and shorten as required, on the cap head screws just watch as the longer ones are not always threaded their full length.
 
Model Fixings do cap heads in all the thread forms mentioned above

Edited By JasonB on 23/03/2011 20:14:21

Edited By JasonB on 23/03/2011 20:18:12

Weldsol23/03/2011 20:40:28
74 forum posts
Hi Dixie I think this site may help
 
 
Paul
dixie23/03/2011 23:10:15
31 forum posts
Hello Many thanks for the information,three very usefull sites will look up the MEW tomorrow. Once again many thanks Brian
JasonB24/03/2011 07:41:47
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25215 forum posts
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Just one thing about the choice of fixings used on this engine. As it is based on an engine from the 1900s I personally feel that cap head fixings have no place on a scale model of this period. The original would most likely have used studs with nuts and washers for the majority of fixings. The choice is yours but I see so many models that look so wrong with modern fixings.
 
J
dixie24/03/2011 20:25:23
31 forum posts
Hello JasonB I agree with your sentiments about fixings. I have used the mdmetric.com
chart to find the nearest BA size, so all I need now is to make or buy some studding and nuts in 3-4-6-7-8-9-11 BA. Thanks for your help.
Brian
JasonB24/03/2011 20:52:21
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Again studs should not be made from studding they would have been rod with a suitable thread on both ends, it does not take too long to knock them up just make sure they all end up the same length and don't hace too much thread showing above the nut.
 
You don't have that many in your engine, 56 just in my TE cylinder
 
EKP have a good range of BA fixings

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