Due to manual measurement, please allow 0., 1-0., 3mm error. 1~50pcs Black 304 A2 Stainless Steel Acorn Cap Nut M3 M4 M5 White Cover Nut For Screws 304 Stainless Steel Nylon Brass Acorn Nut Hex Head Cap Nylon Dome Cap Nuts M3 Stainless Steel The cap nut and stainless steel hexagonal slotted nut are equipped with a split pin, which is matched with the bolt. It is used to bear vibration and alternating loads, and can prevent the nut from loosening For damaged, rusted nuts and bolts, this is a tool for unscrewing screws, nuts and the most important conductive stabilization. 50pcs Acorn Cap Nut M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 304 Stainless Steel Black White Nylon Brass Cap Cover Dome Blind Nuts-M24 (1pcs),Nickel plated Easy to install and durable , M1 M1., 4 M1., 6 M2 M2., 5 M3 M4 M5 M6 M8 M10 Titanium Hex Nut