Description:This T-type screw is a new type of screw is mainly used in stepper motor, machine tool rails and other equipments.Feature:Diameter: 8mm screwLead distance: 1/2/4/8/12/14mm (lead refers to a circle in a straight line distance) (Optional)Material: All stainless steel screwSteel length: 400mmQuantity: 1pcPackage includes:1 x 400mm Lead1 x Screw nut