122248 Grub Screw, Socket Head, 1/8in. BSP x 3/4in.for locking position of Eccentric pin 54615, used on all Feltham models, fits in end of Auxilary Link arm 71633/34, spark eroded 1.5mm hole for lockwire, specially made for Four Ashes Aston Martin. 

These are often dog eared & in need of replacement.

2 needed per car.