For 356C -- This cable has a 7mm thread at the pedal end and a 6mm thread at the clutch end.

Attaching hardware:

At the pedal,

Lock nut: M-7

Sleeve nut: 695 423 407 00.

Swivel piece: 695 423 405 00.

At the clutch,

Lock nut: M-6

Clevis: 900 166 002 02.

Clevis clip: 999 166 001 01.