GB/T 9074.20-1988
Cross recessed hexagon head tapping screw with indentation and plain washer assemblies-type C
GB/T 9074.20-1988
Cross recessed hexagon head tapping screw with indentation and plain washer assemblies-type F
GB/T 9074.21-1988
Cross recessed hexagon head tapping screw with indentation and large plain washer assemblies-type C
GB/T 9074.21-1988
Cross recessed hexagon head tapping screw with indentation and large plain washer assemblies-type F
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and plain washer assemblies-type C
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and plain washer assemblies-type F
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and large plain washer assemblies-type C
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and large plain washer assemblies-type F