… Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring …
Explanatory notes
… 73.18 ‑ Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter‑pins, washers (including spring … provided that their heads are slotted. Drive screws have very steep threads and are often driven into the material …