Bolts & nuts in 8.8 and 4.6 grade are used extensively in railways all over the world, it is mainly used in rail coaches and railways tracks. Our company manufactures all kind of bolts used in railways in carbon steel, alloy steel and stainless steel.
https://goo.gl/VS5TpX
https://www.cncmachingparts.com/
Jiesheng Hardware located in QiaotouTown Dongguan city Guangdong Province, now we has all kinds of imported machines, CNC computer lathe , computer processing center, precision automatic lathe, screw machines.