... , nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, non-standard nut, non-standard screws, egg neck bolt, fishbolt, countersunk head bolt. ... and supporting detection equipments. And a Research & Development Department has been established,and we canmanufacture various high ... pressure pipeline) in 2010. We have effected "global product liability insurance" for our products from People's ...