... self tapping screw 1.Head tpye:HWH,HFH,PAN HEAD,FLAT HEAD,BUGLE HEAD ect. 2.Size:#6,#7,#8,# ... 10,#12,#14 self drilling and self tapping screw SUPPLIER:Material:carbon steel C1022 ... or C1018Finish:zinc plated,painting,dacromat,RuspertSize:#6,#7,#8,#10,# ... delivery,competitive price self drilling and self tapping screw