... kinds of screws, such as bolts, nuts, washers, self tapping screw, self drilling screw, wood and machine screws hex bolts, nuts and other screws fastenersClass 4 ... /7996/7997 3HEXAGON HEAD WOOD SCREWSDIN571 TAPPING SCREWS 1PAN HEAD/FLAT COUNTERSUNK HEAD/RAISED COUNTERSUNK HEAD TAPPING SCREWS WITH SLOTDIN7971/7972/7973 2CROSS RECESSED ...