When using hexagon socket screw clean working is ensured and overturning of the head is virtually impossible. The manufacturing according to DIN ensures perfect compatibility in all technical sectors. The great choice of colours allows a whole array of new applications and possibilities for your very own and individual system! Please note that too long screws may damage a radiator! Technical specifications: Material: Steel, zinc coated Colour: Silver Conforming with DIN 7380 Thread length: 40mm Overall length: 42mm Head diameter: 7mm Extent of delivery : 1x Screw ISO 7380 M4 x 40 filister head hexagon socket zinc coated