... 4.QC inspect after products finished 5.brass screws A:certification: ISO9001:2008B.Products Available bolts, screws, nuts, rivets, Heatsink, shafts(axles, ... .6. Aluminum: Al6061, Al6063,AL7075,AL5052 etc.E.Processing Method cnc machining, turning, milling, drilling, grinding, broaching, welding,stamping, and ... or as requiredparts as below: Welcome to our Factory brass screws with nylon tip