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  1. Johnsim

    Too many screwheads in an electrical device

    mshimko; Well, partner, you're dealing with a Canadian here. I would typically see a Phillips #2 or a Robertson #2 head on the cable clamp, the L16 for BX, say, a Phillips #2 or a Robertson #2 or a slot head on the ground screw, usually different from the cable clamp if the cable is NMD90 house...
  2. Johnsim

    Why Are Robertson Screws So New To America?

    Corypad Check out mshimko's post regarding decks, which I mentioned earlier. He's the kind of guy I mean when I say closest to the fastener's use in the field, a guy who is physically installing (or removing) them. I am a guy who has put plenty of Robbies and Phillips heads into structures from...
  3. Johnsim

    Too many screwheads in an electrical device

    In order to wire a duplex receptacle, install it in an in-wall box and put the cover plate on requires three, perhaps four or five different screwdrivers. How come there are so many different heads on fasteners in the same commonplace device?
  4. Johnsim

    Why Are Robertson Screws So New To America?

    CoryPad; I won't argue that there can't be a better driver recess in a screwhead than Robertson's. Torx is much more recent. I think TBP's response in this thread is much more to the point. Robertson's penetration of the US market with a very good product was resisted by some heavyweight...
  5. Johnsim

    Why Are Robertson Screws So New To America?

    Guys, I was not asking about fasteners for finnicky high torque applications as in aerospace or reactor designs. The simple fact is that the Robertson head screw is better than anything else for a wide class of mundane but necessary applications and the doggone thing stays on the driver where...
  6. Johnsim

    Why Are Robertson Screws So New To America?

    unclesyd Thanks for your reply. I would like to see that article.
  7. Johnsim

    Why Are Robertson Screws So New To America?

    On the occasions that I have worked in the US, (several) I have noted with surprise that square drive screws are not nearly as familiar to American tradespeople as they are to Canadians. The race to patent every conceivable screwhead design was won by a Canadian in the sense that he got the best...

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