This is the long head stud (3/8" x 4-7/16") for all of the 4.5 litre engines. Note: There are 9 studs per engine (Sold Each)  1952-1955  4.5 Litre Engine Only  

This is the Cylinder Head Long Stud to Upper Half Crankcase. 9 Per Head (Sold Each) late 4.25MkVI, Dawn, Wraith engine approx 474DA

This is the Bolt for the Gear Selector Mechanism to Retaining Jaw Fork. Supersession: X108Z 1945-1955 Silver Wraith, Mk-6, R-type, Sliver Dawn 1955-1959 Cloud I & S1

Bolt Square Head 2BA x .4in Long fits: Quadrant LHD Manual & Power Steering to Microswitch Operating Lever 1955-1959 Silver Cloud I and S-1 

This is the Setscrew Headlamp Flash Switch. 1959-1965 S2,3 & Cloud II,III 1959-1968 Phantom V