1)HEAD:Hex head (H.W.H &H.W.F) ,C.S.K,Pan head ,Large wafer head ,Bugle head ,Pan framing ,wafer ,Truss and so on .
2)HEAD RECESS: Philips 4 ribbs ,pozi,philip(cross),square.
3)PLATING:plain ,yellow zinc,black zinc ,black posphated,gray phosphated ,black oxide,dacrotized ,ruspert ,brass,xylan and so on .
Looking forward to your coming and cooperation.