Many times we get asked to supply quite detailed and specific measurements, etc for an item and while we happy to comply and help, it is best if you simply order one (a connector for example) to determine if an item is suitable for your project, system or build.
Sadly we have spent so much time doing this and never hear back from those requesting it. So ordering a sample to review is everyone's best option. What we really mean is while we are happy to help with simple requests such how far apart are the holes, etc we can't do much more than that time wise.