we factory sepcialing mading the wheel bolt u-botls center bolts
king pin kit and king pin .... .we must use good matarial mading it
example :（material :*5#/*0cr/*5com)
grade:8.8/*0.9/*2.9
we can produst the production according samle and drawing
we aslo can provide the carton boxs fastened with pallet according
to costomers requirements
