Rust-resistant stainless steel M5 bolt set.Suitable for use on shafts, etc. Stainless Steel Screw Pitch: 0.03 inch (0.8 mm); Compatible Allen Wrench: 0.2 inch (4 mm); Weight: M5 x 0.6 inch (16 mm) 0.1 oz (4 g); M5 x 0.7 inch (18 mm); Weight: 0.2 oz (5 g); M5 x 20 mm: 6 g); Washers included *Size is the length of the neck. Product color and size: The color of the product may look different from the actual product depending on your display settings. Note that product specifications, logos, et cetera may be subject to changes and refinements. -We appreciate your understanding.