... client’s requirements. 2) Types:hex bolt,hexagon bolt,hexagonal bolt,hex socket bolt,CSK bolt,flange head bolt;hex nut,hexagon nut,hexagonal nut,heavy ... thread,double end head thread,double thread rod;flat washer,plain washer,spring washer.3).Steel Grades: Stainless Steel 304, 304L ... , 316, 316L, 321, 317L,904L Super duplex stainless steel F55, F51, HastelloyB&C, Inconel, Incoloy etc. 4). ...