… nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar …
Explanatory notes
… nuts, coach screws, screw hooks, rivets, cotters, cotter‑pins, washers (including spring washers) and similar … spikes) are large wood screws with square or hexagonal unslotted heads. They are used to fix railway lines to the … (c) Threaded mechanisms, sometimes called screws, used to transmit motion, or otherwise to act as an active part of a …