castled nuts

[Nacho-RT74]

I have a set of "castled" nuts to be used on piston rods. Some advantage over the stock ones ? These were barelly used on an engine maybe 2 or 3 weeks.

[elacruze]

I'll bypass the discussion of origin and say that all else being equal, the castellated nuts may be lighter. 

[Nacho-RT74]

ok, these are a little bit higher than the originals, so what loose on cuts, wins on height

[maxwellwedge]

I always go with a new set of ARP bolts and nuts.....cheap insurance for the weakest link in the chain.

[John_Kunkel]

True "castellated" nuts are intended to be used with cotter pins in which case they're reusable indefinitely.

[Nacho-RT74]

I thought they were kinda conical and the castellated area was made to make some pressure over the threads like a spring

[moparguy01]

nope, its for a cotter pin to be able to sit in one of the grooves and not allow the nut to spin.

[Nacho-RT74]

Ok, well, will use them anyway. They are taller so more threads being involved on torque

Unfortunatelly one rod got the studs slightly damaged on first 2 because couple of the nuts had some small nick on threads, but nothing to worry. Tapped the nuts and everything fine with them now