… screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or …
Explanatory notes
… screws, screw hooks, rivets, cotters, cotter‑pins, washers (including spring washers) and similar articles, of iron or … to assemble or fasten goods so that they can readily be disassembled without damage. Bolts and screws for metal are … are rarely pointed, and may have slotted heads or heads adapted for tightening with a spanner or they may be …