... plated and plain 2.Material: carton and stainless steel hex flange screw 1.Size : 5/16x50 ,1/4x50,1/4x100,3 ... /pallet , polybag ,drum and etc...5. We can produce hex flange screw , based on your drawings and photos .Good quality , good ... holding the principle of “Mutual benefit and Sincerely cooperation”, starting a new “Double Win” situation. Welcome clients at home and abroad ...