ISO (International Standards Organization) is not Italian threading. For track cogs and freewheels, there is no difference between ISO and British threading. From Sheldon's site:

Most ISO standards are compatible with British standards. These standards include:

1" x 24 tpi headset thread
1" (25.4 mm) handlebar/stem clamp diameter
1.375" x 24 tpi bottom bracket thread (left-hand on the fixed cup)
1.375" x 24 tpi freewheel thread
56 TPI spoke thread
1 mm axle thread