While trying to lubricate the kingpins, it seems one of the grease nipples on the front suspension of my 1975 4/4 is blocked.

Does anyone on here know the exact size of these please?

From what I can work out they may be 1/4 x 28 UNF.

I currently have a 90 degree angle, which may not be the best for flow?

Any recommendations please for regular grease nipples.

I appreciate I could buy a remote conversion kit or even a newer Morgan, but would prefer responses to size of grease nipples required.
Many thanks! smile