Need a little help with a dragonfly mk2

[Fartsimpson]

One of the linkage pins snapped, one with the little clip on one side I don't have any thing to measure the broken one with where I'm at, but does any one know exactly what the dimensions are. The length and diameter of the pin???  Thanks dudes

[HPP-Mechanic]

Ive broken that pin 2x and finally went with a hardened shoulder bolt & 4-40 nut. I cant remember the Dragonfly thread, but I posted a pic of the bolt I use McmasterCarr).  Make sure you are using synthetic motor oil for the pump. I broke the 1st pin  after I just oiled w/silicone oil & the pumping got harder & harder. A pumper needs slippery oil. Silicone oil is sort of sticky.

Found them: EDP #81509   1/8x1/2 HEX SOCKET HEAD SHOULDER (5 each) 362-0208-01-0005  not sure if these were from Amazon or McMaster Carr. 

[longhunter]

Silicone oil should never be used for metal to metal contact. It will cause galling of the parts.
It should only be used on metal to non-metal contact surfaces like o-rings, pump cups, etc.