Drilling Screw Pan head without robber washer Different sizes available Drilling Screws 1)Material:Iron,stainless steel,copper and etc.. 2)size:it's up to the clients 3)Standard :DIN,JIS ISO ,BS,ANSI...ETC 4)Surface Finish:zinc plate,plain finish 5)Head type : pan head,oval head,H.W.H head,H.WF head,C.S.K head ,truss head. 6)Head recess: philips ,square ,H.WF, 7)Packing:Carton and pallet or ...