Hirens Boot CD v15.2 - ISO
Note: Link Updated as on 13-Sep-2013

Click here to Download or
if the above link isnt working for you, try this official link
Download from Official Mirror


Tags: hirens boot cd download, hiren boot cd download, hirens boot cd download, hirens boot cd download free, hiren boot cd free download, hirent boot cd free download, 15.2, iso 

Notes on Nuts and Bolts

            A screw thread is a helical groove on a shaft. When used for delivering power, it is called a drive screw. Drive screws arent really all that efficient, as they loose a significant amount of power to friction. However, this friction can be put to use in the case of threaded fasteners. You might say that a drive screw is an inclined plane wrapped around a post, while a fastener is a wedge wrapped around a post.

Bolt Terms:

               As nuts and bolts are not perfectly rigid, but stretch slightly under load, the distribution of stress on the threads is not uniform. In fact, on a theoretically infinitely long bolt, the first thread takes a third of the load, the first three threads take three-quarters of the load, and the first six threads take essentially the whole load. Beyond the first six threads, the remaining threads are under essentially no load at all. Therefore, a nut or bolt with six threads acts very much like an infinitely long nut or bolt (and its a lot cheaper).

Stress on bolt threads. Note how the majority of the stress is on the first thread to the left. Image from Spiralock.		Thread	%	%Sum
		1	34%	34%
		2	23%	55%
		3	16%	71%
		4	11%	82%
		5	9%	91%
		6	7%	98%

           There is little point in having more than six threads in anything. Nuts with National Coarse threads typically have 5 threads in them, whereas nuts with National Fine threads have about 8 threads. Nuts are usually stronger than the bolts they are on, which is to say that the bolt will usually break before the nut strips.
           It is often said that two threads must be exposed above a nut. The reason for this is that the first two threads of a bolt are often poorly formed, and may not engage the nut properly. If theyre not doing their share, the other threads in the nut will be overloaded, and the nut may strip.

Source : Gizmology

Download the Google Chrome offline installer version of the world’s most famous browser. Standalone or offline version means that the installer needs no data to be transferred when installation. If you have ever installed Google Chrome, you would have seen that it just downloads a file less than 1 MB in size and when you run it, it downloads the whole software. This is not possible when you have a slow internet connection. So you can download the offline installer and install it on several PC’s and any number of times without any bandwidth usage.
If any of our download link is not working or showing an error then click here to browse through all our files at Skydrive.have fun :)