This standard BS 6499:1998 Metal screw necks, screw caps and inner seals for metal containers. Specification is classified in these ICS categories:
55.120 Cans. Tins. Tubes
This British Standard specifies requirements, including screw thread dimensions, for a range of metal screw necks for metal containers, and for the metal screw caps and inner seals intended for use as closures and tamper evident devices respectively.