3 ms·

I must put you on to my carpenter friend then, seems he's wrong. Not in America btw.

• wahern 6y ago
  If you do a particular type of work, such as building decks, then 3 1/2" will mean a very specific type of screw. But if you go into a good hardware store (Ace, a smaller, neighborhood chain, is often better than big-box Home Depot or Lowes in terms of variety) and tell the clerk you want a 3 1/2" long screw, things can get frustrating rather quickly unless you can provide some context. When you're working with wood, it's easier to fudge things, but when you're working with machine screws, details like pitch and shank profile often cannot be ignored.