In the context of threaded fasteners, which type is generally more effective for resisting pulling apart?

The buttress thread is particularly effective for resisting pulling apart due to its design, which includes a sloped flank on one side and a more vertical flank on the other. This configuration allows the thread to effectively handle axial loads in one direction, making it ideal for applications where forces are applied to pull the fastener apart. The steep angle of the load-bearing flank increases the resistance to stripping and enables the fastener to maintain a tighter grip under tension.

In applications where a fastener is subjected to pulling forces, such as in heavy machinery or structural components, the buttress thread offers superior performance compared to other thread types. Traditional threads, like the square or double thread type, may not provide the same level of efficiency in resisting axial loads due to their geometry, which is optimized more for rotational force rather than tensile strength. The unique characteristics of the buttress thread make it a preferred choice in contexts where separation forces must be minimized.