BS 61:1969

This standard BS 61:1969 Specification for threads for light gauge copper tubes and fittings is classified in these ICS categories:

• 21.040.01 Screw threads in general

This British Standard specifies requirements for a series of threads intended for use with light gauge copper tubes and associated fittings, to BS 61 : Part 1, BS 66, BS 99 and BS 1306*, for which BSP threads to BS 21† are not suitable or cannot be utilized due to the thickness being insufficient.

Threads for use with tubes and fittings to BS 66 & 99, BS 1306 and BS 2871:Part 2, for which threads to BS 21 are not suitable or cannot be utilized due to the thickness being insufficient.