the narrow neck portion 48 fig7 and integral load tab 50 formed on the end of narrow neck portion 52 fig7 shows the lock links 34 in more detail in that the fasteners 32 have been removed to reveal the manner in which a center pedestal portion 54 of the of the lock link 34 engages the vane stem 52 specifically in the exemplary embodiment the vane stem is formed with an eccentric d shaped key 56 which in the exemplary embodiment is generally rectangular in shape with one rounded side 58 and an opposite flat side 60 the round pedestal portion 54 of the lock link 34 is provided with a cut out 62 that mates with the key 56 thereby preventing any relative rotation between the lock link 34 and the vane stem 30 and hence the vane 26 an undercut 64 is formed at the base of the stem 30 where it is joined to the key 56 and the undercut lies above the pedestal portion 54 of the lock link when the lock link is located over the key as best seen in fig8 the undercut provides a required amount of clearance or u201c play u201d to facilitate assembly and alignment of the vanes at the opposite end.