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<blockquote data-quote="Simon Coffin" data-source="post: 104828" data-attributes="member: 388">Re: Extruded rack rails - Available in the US?Hey Tim,You are right, a #10 and M5 screw are very close in size, 4.8mm for the #10, 5mm for the M5.&nbsp; In cross sectional area, the M5 is 7% bigger.&nbsp; Not sure if that is significant for the expected loads we put on the screws or not.If you run out of captive nuts you slide more in.&nbsp; The rail is installed with one end open so the nuts can be added/removed.The M5 screws I have were standard off the shelf things bought from a normal German hardware store, but they have a large head and take a #3 Phillips screwdriver vice the smaller #2.&nbsp; Picture attached.&nbsp; I use flat nylon washers to protect the equipment as well.Yes, you are right, a weakness of the extruded rail is a too long screw can bottom out.&nbsp; Although in reality, a 15mm screw is usually used for all flat steel rack ears and cannot bottom out.&nbsp; The 20mm screw is used for thicker rack ears and can bottom out if used alone.&nbsp; In which case, to adopt the German mentality, you are using the wrong screw.&nbsp; Get the right size screw and do the job properly.[ATTACH]152740[/ATTACH]CiaoSimon</blockquote>

[QUOTE="Simon Coffin, post: 104828, member: 388"] Re: Extruded rack rails - Available in the US? Hey Tim, You are right, a #10 and M5 screw are very close in size, 4.8mm for the #10, 5mm for the M5. In cross sectional area, the M5 is 7% bigger. Not sure if that is significant for the expected loads we put on the screws or not. If you run out of captive nuts you slide more in. The rail is installed with one end open so the nuts can be added/removed. The M5 screws I have were standard off the shelf things bought from a normal German hardware store, but they have a large head and take a #3 Phillips screwdriver vice the smaller #2. Picture attached. I use flat nylon washers to protect the equipment as well. Yes, you are right, a weakness of the extruded rail is a too long screw can bottom out. Although in reality, a 15mm screw is usually used for all flat steel rack ears and cannot bottom out. The 20mm screw is used for thicker rack ears and can bottom out if used alone. In which case, to adopt the German mentality, you are using the wrong screw. Get the right size screw and do the job properly. [ATTACH=CONFIG]152740.vB5-legacyid=8077[/ATTACH] Ciao Simon [/QUOTE]

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