GB/T819 Stainless Steel Cross Recessed Countersunk Head Machine Screw

GB/T819 stainless steel cross recessed countersunk head machine screw is a national standard metric machine fastener, equivalent to ISO7046 standard.

It features a 90° countersunk cone head, which can be fully embedded into pre-counterbored holes to form a smooth flush surface without protrusion. The Phillips cross recess fits common screwdrivers and electric bits for stable tightening.

Different from tapping screws, it adopts full standard metric machine thread, used to match pre-tapped nuts or internal threaded holes for reliable locking.

Made of stainless steel A2/A4, it delivers rust and corrosion resistance, suitable for damp, outdoor and corrosive working environments. Widely applied in electronic casings, lighting fixtures, precision equipment, household appliances and metal sheet assembly.