unc to metric or imperial

[dixieParticipant @dixie]

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

0-80×3/16,1-72x 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

[dixieParticipant @dixie]

a chart please

[Dennis RParticipant @dennisr]

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

[JasonBModerator @jasonb]

About half way down the page these tables gives metric, BA, UNC & UNF

 

http://mdmetric.com/tech/tict.htm

 

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

[WeldsolParticipant @weldsol]

Hi Dixie I think this site may help

 

http://www.engineersedge.com/screw_threads_chart.htm

 

Paul

[dixieParticipant @dixie]

Hello Many thanks for the information,three very usefull sites will look up the MEW tomorrow. Once again many thanks Brian

[JasonBModerator @jasonb]

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

[dixieParticipant @dixie]

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

[JasonBModerator @jasonb]

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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