Home / Hardware Product Description M3*40 Column Head Screw 4pcs. HSP Himoto Wind Hobby Spare Part Specifications Head type Column Thread type Machine Thread size M3 x 0.5 Length 40mm Tool 2.5mm Hex key Finish Black Brand RCH Product Code M340-CLHX-B-4pk Weight 0.03kg Delivery M3x40 Column Machine Head Screw 4pcs. Item in Stock Product Code M340-CLHX-B-4pk £1.50