... and plain 2.Material: carton and stainless steel hex flange screw 1.Size : 5/16x50 ,1/4x50,1/4x100,3/16x50 ... , polybag ,drum and etc...5. We can produce hex flange screw , based on your drawings and photos .Good quality , good service ... -sales service for our clients . Our Guideline is: Improve together with our clients by holding the principle of “Mutual benefit and ...