Thank you for viewing ₍ᐢ‥ᐢ₎ ♡ Dimensions: M8 x 55 mm; Rod Length: 55 mm; Pitch: 1.25 mm; Flange Diameter: 18 mm; Hex Width: 12.8 mm; Head Thickness: 7.8 mm Material: Made of 304 stainless steel, polished finish, suitable for use in wet or dry environments, rust-resistant, and has excellent corrosion resistance. Applications: Widely used in the assembly and maintenance of homes, machine tools, construction, and DIY projects. Such as the assembly and fixing of guardrails, household appliances, pipeline equipment, equipment, steel frame houses, etc. Design: There is a circular serrated flange under the head of the flange bolt. This functions as a gasket, distributing the load and preventing loosening. Installation: A wrench is required for installation. Generally, hex nuts are used to form a fastener device (not included in the package). It can also be used alone with components that have pre-threaded holes. uxcell Hex Serrated Flange Bolt Screws Metric Thread 304 Stainless Steel M8x55 mm 10pcs 1116-2000s★ #pinoshop I have many other items for sale (*^^*)