This is a replacement Colt ejector rod head for Colt post war D frame revolvers. This replaces Colt part number 56165. It is a 5x40 thread as per blueprint. Keep in mind, Colt threads ARE NOT CONSISTENT. Your ejector rod threads can be chased with a 5x40 die as the original rod thread diameters are notoriously inconsistent with those revolvers. There have been a couple of variations over the years in regards to thread size. We have a hassle-free return policy if this particular part does not fit your variant or model.
