We offer various fish bolts base on standards, and also we could manufacture fish bolts follow up customer's requests. standard use gost 799-1973 a broad-gauge rail fixed with fish plate bolts din 5903-2-1997 fish plate bolt-part2: with square head din 5903-1-1997 fish plate bolt-part 1: with round and oval shoulder cns 4694-1979 fish plate bolts (with square head) cns 4693-1983 fish plate bolt (with a round head oval neck) as 1085.4-2002 railway with permanent materials-part 4: fish plate bolt and nut.