Hi Jasper,
The correct Jaguar Part No for these nipples is C3044/1. They are 1/4" x 28 TPI to conform to SAE zerk standards. Regrettably, if you order these from SNG, they will supply 1/8" BSP nipples, which have a major diameter of 0.383", and do not fit anywhere on an E-Type that I know of. I have notified them of this error on at least 3 occasions over 6 or so years, but no action evident......
To complicate the issue, there are nipples made with BSP threads (also 28 TPI), so be wary. My advice would be to source from EBay or similar, straight/90 deg/45 deg are available.....
Kind regards,
Norman
