... shaft, stud bolt,screws, bolts, non-standard bolt, non-standard nut, non-standard screws, egg neck bolt, fish bolt, countersunk head bolt., expansion bolt and expansion ... types:1. High strength alloy steel double end stud- , fully-threaded stud and heavy hex nut applied on petrochemical industry, ... .2. Metric and ANSI round head oval neck bolt (fish bolt) with mechanical property of Grade 8.8 and ...