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When tightening a bolt, I have read that I should tighten to provide preload of the order to 90% of the yield stress in the fastener. I understand the importance of preload, but find the 90% extremely high with little safety factor due to the unpredictable nature of coefficient of friction and...

What packages do people use to draw fastener scematics suitable for reports? Cheers, Matt.

I am trying to find an alternative to machining a slot through a steel nut using a slot mill. Can anyone tell me if this would be possible to achieve using laser cutting, and point me in the direction of equipment that may be capable of this. The nut is M16, 24mm accross flats. I need to find...

What programs do people find the most useful for drawing schematics report / publishing standard? Thanks, Matt.

What are the differences between ISO 898-1 grade 8.8 bolt steel and ISO 898-2 grade 8 nut steel?

Can anyone help me find companies where I can get quotes for micro diameter screws. I am specifically after thread forming screws with diameters below 2mm. Thanks, Matt.