Motherboard Standoff
in [Hardware]
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From: Grinder on 6 Jun 2010 21:51 Does anyone know what the diameter is on a (sort of) standard hex motherboard standoff? One that looks like this: http://i249.photobucket.com/albums/gg220/bdrem1/Parts/Standoff/STANDOFFM3Alarge-10-2-BD.jpg A 5mm or 3/16" socket works, but I was hoping to know the standard (if there really is one) dimension.
From: Paul on 6 Jun 2010 23:44 Grinder wrote: > Does anyone know what the diameter is on a (sort of) standard hex > motherboard standoff? One that looks like this: > > http://i249.photobucket.com/albums/gg220/bdrem1/Parts/Standoff/STANDOFFM3Alarge-10-2-BD.jpg > > > A 5mm or 3/16" socket works, but I was hoping to know the standard (if > there really is one) dimension. Wikipedia has a section on this. http://en.wikipedia.org/wiki/Computer_case_screws "There is no rigid standard for what measurements a case's standoffs use. However, use of M3 and 6-32 threads is nearly universal.[citation needed] There is also no single standard for the height of the standoff; one quarter inch is common but not universal." The formfactors.org site is where this *should* be documented, but I can't find it. I have some that look like yours, but mine are nickel plated, and look like M3 thread on the bottom, and a standoff height of 0.25". It's pretty weird to combine both measurement systems in the same item. A 6mm hex driver seems to fit mine better than a 1/4" driver does (from flat face to flat face, it's 5.994mm - it's still slightly loose inside the 6mm driver). The female thread on the top of the standoff is different than the male thread on the bottom. Since your one fits a 5mm driver, then it can't be the same as the one I've got. The only reason I bothered comparing it, is it looks like yours, but apparently isn't quite the same. And the Wikipedia sample picture, shows they're all over the place in terms of dimensions. Which is why you have to use the hardware that comes with your computer case. Always keep the bag of screws... http://en.wikipedia.org/wiki/File:Toennchen_IMGP5029_wp.jpg Paul
From: Grinder on 7 Jun 2010 00:08 On 6/6/2010 10:44 PM, Paul wrote: > Grinder wrote: >> Does anyone know what the diameter is on a (sort of) standard hex >> motherboard standoff? One that looks like this: >> >> http://i249.photobucket.com/albums/gg220/bdrem1/Parts/Standoff/STANDOFFM3Alarge-10-2-BD.jpg >> >> >> A 5mm or 3/16" socket works, but I was hoping to know the standard (if >> there really is one) dimension. > > Wikipedia has a section on this. > > http://en.wikipedia.org/wiki/Computer_case_screws > > "There is no rigid standard for what measurements a case's standoffs use. > However, use of M3 and 6-32 threads is nearly universal.[citation needed] > There is also no single standard for the height of the standoff; > one quarter inch is common but not universal." > > The formfactors.org site is where this *should* be documented, > but I can't find it. > > I have some that look like yours, but mine are nickel plated, and look like > M3 thread on the bottom, and a standoff height of 0.25". It's pretty > weird to > combine both measurement systems in the same item. A 6mm hex driver > seems to > fit mine better than a 1/4" driver does (from flat face to flat face, it's > 5.994mm - it's still slightly loose inside the 6mm driver). The female > thread > on the top of the standoff is different than the male thread on the bottom. > > Since your one fits a 5mm driver, then it can't be the same as the one > I've got. > > The only reason I bothered comparing it, is it looks like yours, but > apparently isn't quite the same. > > And the Wikipedia sample picture, shows they're all over the place in > terms of dimensions. Which is why you have to use the hardware that comes > with your computer case. Always keep the bag of screws... > > http://en.wikipedia.org/wiki/File:Toennchen_IMGP5029_wp.jpg The 5mm (3/16") standoffs are the only ones I've seen with new cases, but I tend to buy Antecs.
From: edfair on 7 Jun 2010 23:29 Over the years I've saved some of every different one I've run across just in case I ever needed to change one. In just the 1/4" high, threaded on one end, tapped on the other, I've seen 5 or 6 different dimensions across the flats and the 4 possible versions of thread and tap between inch and metric. In the parts box there are probably 8 or 9 slots where they are segregated.
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