self-tapping screw 1.We can produce all kinds of screws ... steel& stainless steel 3.Our advantage Best price.Good qual self-tapping screw1.Head tpye:HWH,HFH,PAN HEAD,FLAT HEAD ... ,#12,14# 3.Length:13-240mm Semi-Round Head Self-Tapping and Self-Drilling Screw SUPPLIER:2.Finish:zinc plated,painting,dacromat ...