... nut, nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, non-standard nut, non-standard screws, egg neck bolt, fishbolt, countersunk head bolt. Expansion ... .6. International internal and external hexagon bolt with the mechanical property of Grade 4.8, 8.8, 10.9 ... and 8.7. Various nuts, flat gaskets, spring washers, mechanical bolts, tapping screws, fibreboard screws and hexagonal wood screws, ...