Camshaft seal for Simms CAV fuel injection pumps fitted to many engines during the 1930’s, 40’s and 50’s.
Item 79 on the exploded diagram. 35mm outer diameter. If yours has a 34mm outer diameter see HERE
Fits the following pumps:
SPE4A , SPE3A , SPE6A , BPE3A , BPE4A, BPE6A