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By certification 
ART. NAME ART. SECIFICATION BUTTON HEAD(mm) PACKING FINISHING
Plat head (self drilling ) screw 4.2X13 3 1000/1 yellow zinc, mechanical zinc
4.2X16
4.2X19
4.2X25
Plat head (self drilling ) screw 4.2X32 3 500/1 yellow zinc, mechanical zinc
4.2X41
Plat head (self drilling ) screw 4.2X13 3 1000/1 yellow zinc, mechanical zinc
4.2X16
4.2X19
4.2X25
Plat head (self drilling ) screw 4.2X32 3 500/1 yellow zinc, mechanical zinc
4.2X41
