Wholesale Bolts Oval neck bolts, also known as fishtail bolts, egg neck bolts, and track bolts.It has a round head, oval neck and then the thread with different length. That is why it is called round head oval neck bolt or egg bolts too. It is mostly used in the connection of track joint splint (fish plate) and grooved pipe fittings, which play a fixed role. It matches with hex flange nut and...