Screw sizes

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Screw sizes
Posted by NVSRR on Tuesday, May 16, 2017 10:48 AM

what screw sizes are used to secure post war controls to a panel?  Like the turnout controls, crane controls and such.   I am working on building a panel



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Posted by BigAl 956 on Tuesday, May 16, 2017 1:04 PM

There is no exact answer for that one as every type of control has it's own size and length. #4 is a good size for a lot of things. However some controls like UCS tracks are mounted underneath and friction-slide into place with flat-head screws. O22 switch controls are 2-1/2 thin #4 sheetmetal screws. It really varies and requires a sack of controls and a trip to the hardware store.

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Posted by rtraincollector on Wednesday, May 17, 2017 11:22 AM

BigAl I believe what he really was looking for was what size screw to secure a controller to a control board. I'm guessing some type of long and skinny wood screw, so it could penertrate the wood base. 

And again it depends as a O22 controller mounting holes are probably deeper than the mounting screw holes say for a push button controller. here it would be more the legnth than the size in diamiter. 

Life's hard, even harder if your stupid  John Wayne

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Posted by lionelsoni on Wednesday, May 17, 2017 1:02 PM

For what it's worth, a number-5 screw has a major diameter of 1/8 (.125) inch.  Other numbered sizes go up and down from there in .013 inch steps.  So:

 1 .073
 2 .086
 3 .099
 4 .112
 5 .125
 6 .138
 7 .151
 8 .164
 9 .177
10 .190
11 .203
12 .216

Bob Nelson

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Posted by BigAl 956 on Friday, May 19, 2017 12:09 PM

I know first hand from my control panel a #022 switch control needs a long skinny screw. 2 1/2" #4 should do it.  Use sheet metal screws instead of wood screws that taper in. Lionel never had 1 standard size to mount controls so the best way to figure it out is to throw your controllers in a bag and schlep over to the hardware store and match them up as 

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Posted by NVSRR on Tuesday, May 23, 2017 8:49 AM

Thanks.  I figured it was a mishmosh of sizes.   Was wondering if there was a general consensus on sizes for securing controls.    A more generally recommend this size for this controller. That size for that one. And so on.      Maybe i will sit and come up with that list as i work on my panel




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