- Ball screw nut without preload - Axial clearance: 0.08mm up to diam 40mm 0.12mm diam 50mm and over - Materials: Steel nut 18CrMo4h Steel balls 100Cr6 Mounting - To be mounted by yourself on the ballscrew after machining the screw ends (see mounting precautions) Info - Nut not compatible with KGS screws Accessories - See VAB screw (screw pitch and diameter must match that of nut)