hexagonal France

... drive interface is the part of the screw that receives the tool necessary for tightening and loosening. This drive can be external (hexagonal H, ...) or internal by impression (6 recesses, slot, cross, 6 internal lobes "Torx", ...). The type of installation takes into account accessibility (tight spaces or not, ...) and visibility of the clamping (decorative, discreet, ...) as well as technical characteristics such as the tightening torque. Thus, the head can be: - hexagonal H (NF E 25-112, NF E 27-133, NF E 27-140, ISO 4014, ISO 4015, ISO 4016...