ADVANTAGES:These standoffs are made of aluminum alloy with high strength, two Side female thread, and strong hardness. Â Features: High tolerance CNC machined Strong 6061 aluminum alloy Attractive anodized finish Function M3x40mm Round Aluminum Standoff Column Spacer Female for FPV Quadcopter RC Multirotors Parts DIY 10 Pcs. Free shipping; Free Holiday returns until Jan 31 M3x40mm Screws KOVNOVI 10pcs Aluminum Spacers Column M3 OD=5mm Standoffs... M3 Threaded Rod Round Spacer, Aluminum, Plain Finish, #6 Screw Size, 1/4 OD, 0.14 ID, 1/2 Length (Pack of 25... FEATURE: These standoffs are made of aluminum alloy with high strength, two Side female thread, and strong hardness., ., FUNCTION: It's used for connecting rods, pulling rods or the top column, play the role of connecting or extending nut. NOTE: There may be a slight color difference between the real object and the picture. SIZE: Inner Screw Thread: M3; Total Length: 1., 57 inch/40mm; Outside Diameter: 0., 2 inch/5mm; Color: Black. Manual measurement, please allow a slight dimensional error of the item. M2 Aluminum Spacers, 10 Pcs Metal Spacer Aluminum 2.1mm ID X 4mm OD X 4mm L Aluminum Spacer Screw Standoff Round