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 hex nut or hex heavy nut usually. The common coating of round head oval neck bolt is zinc plated, yellow zinc plated, Dacromet, H.D.G etc. One grooved pipe fitting needs 2 sets of oval neck bolts and nuts. The most grade is grade 8.8 oval neck bolts, as well as grade 9.8. The flange nut matched can be with serration or without. Also the similar type track bolts are usually used in the connection of rail joints.Materials are Q235 and 45# steel, coating is black oxide or H.D.G. There are metric oval neck bolts and AMSE oval neck bolts usually. Production Process of Oval Neck Bolt Specification of Oval Neck Bolts Application Area of Oval Neck Bolts The application range of oval neck bolts is not particularly large, and they are generally used in the connection of track joint splints (fishplates) and grooved pipe fittings, which play a fixed role. website:http://www.jinruibolt.com/bolts/