The grade of metal used to make them is in general far higher [Stainless Steel Nut]
When it comes choosing a screw for a job you always need to ensure that you have the right one. This sounds so simple yet so many people run in to problems by not doing so, and nowhere is the choice of machine screw more vital than when it comes to using machine screws. Make no mistake whilst you may "Get by" by using a self tapping screw that is slightly too short or too wide for the job, do this with a machine screw and it will end in China Shock Absorber Piston Manufacturers tears. Firstly machine screws are made with far more precision and in general feature finer threads than self tappers as an example.
The grade of metal used to make them is in general far higher and accordingly the screw heads are far harder wearing as machine screws are designed for use in situations where they may need to be repeatedly fastened and unfastened. In outside situations where they are exposed to the whether then they are often made of stainless steel, a typical use being in the railway industry where they may be used to hold an electrical panel shut. Care does need to be taken when using them, and the main danger comes from over tightening them, as if they are made of a harder metal than the metal they are being screwed in to then they can easily strip the thread of the item they are going in to. This can be a major problem and in the case of using them to fasten a control panel as an example, could result in the panel having to go away to have a new thread put in.
Or worst case you could find that you cannot undo the panel as you have crossed the thread, or that you simply cannot tighten the screw up as the thread has been stripped. Machine screws should never be used instead of self tapping screws as they are not designed to do the same job, and vice versa. Machine screws are often designed to screw in to a nut or caged nut in a panel. The right thread choice and screw length are vital - Simply put if you do not have the right one to hand for the job then go away and get some more. Use the wrong ones and a 10p screw could write off a 300+ control panel. They are ideal when used as a precision fixing that needs to be easily undone and then redone up again on a repeated basis.
The grade of metal used to make them is in general far higher and accordingly the screw heads are far harder wearing as machine screws are designed for use in situations where they may need to be repeatedly fastened and unfastened. In outside situations where they are exposed to the whether then they are often made of stainless steel, a typical use being in the railway industry where they may be used to hold an electrical panel shut. Care does need to be taken when using them, and the main danger comes from over tightening them, as if they are made of a harder metal than the metal they are being screwed in to then they can easily strip the thread of the item they are going in to. This can be a major problem and in the case of using them to fasten a control panel as an example, could result in the panel having to go away to have a new thread put in.
Or worst case you could find that you cannot undo the panel as you have crossed the thread, or that you simply cannot tighten the screw up as the thread has been stripped. Machine screws should never be used instead of self tapping screws as they are not designed to do the same job, and vice versa. Machine screws are often designed to screw in to a nut or caged nut in a panel. The right thread choice and screw length are vital - Simply put if you do not have the right one to hand for the job then go away and get some more. Use the wrong ones and a 10p screw could write off a 300+ control panel. They are ideal when used as a precision fixing that needs to be easily undone and then redone up again on a repeated basis.
2022-12-01 11:08
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