686 barrel thread spec

[Rude Fat Dog]

Hi,
My first post on this forum and I apologise if the information I require is on this forum but I have just not found it.
I want to rebarrel some 686's and did have the thread specification which I am now unable to find.
Could someone please remind me.
Many thanks,
Greg G

[armorer951]

Welcome to the forum.......

K - .540 X 36
L - .562 X 36
N - .670 X 36

Page 96, figure 153, The S&W Revolver, A Shop Manual, J. Kuhnhausen

[Rude Fat Dog]

Many thanks.