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But that's a case where the threads are definitely external, not internal to the shaft. The threads are the skinny part, and they are raised above the shaft in
by ghshephard 10y ago
But that's a case where the threads are definitely external, not internal to the shaft. The threads are the skinny part, and they are raised above the shaft in the version you just sent.
- Someone 10y agoHow do you know whether the whole shaft was equal in width to what's now closest to the head and something was cut away or whether it was smaller to start with, and something was added? Or,is your argument that this could be a screw: /\_/\_/\_/\_ \ _ _ _ _ / \/ \/ \/ \/ but this _ _ _ _ _/ \/ \/ \/ \ \ _/ \_/\_/\_/\_/ cannot be because the outside isn't sharp enough to 'bite' into the material it is screwed into? I can see the latter holding in rubbery material that tears easily.
- ghshephard 10y agoFirst, hero points for doing a text based screw description. Second, I assume that 100% of screws and bolts are created by cutting away - hard to imagine adding something to the outside of a shaft. The only question is whether the resulting threads are raised above the shaft (screw)- by cutting away the shaft, or sunken below (bolt), by leaving the shaft in place and cutting in the threads. I realize there is nuance here - which is why I"m interested in seeing if I can find a screw (or bolt) that seems to break this pattern.