Product Name: Round Head Square Neck Bolt DIN603 Cl. 8.8 with Zinc Plated Cr3+ Model NO.: Carriage Bolt DIN603 M10x55 ZP CR3+ Finish: Zinc Plated & Black Application: Machinery Grade: 4.8 & 8.8 Standard: DIN, ANSI Head Style: Round Connection: Common Bolt Type: Mushroom Head Material: Carbon Steel Process: Cold Forging,Hot Forging,Machining Trademark: NBSB Transport Package: Small Box & Bulk Specification: M5-M30 Origin: Ningbo Product Description •ASME B 18.5 Round Head Sqare Neck BoltsItemDIN603 Carriage Bolt Gr.4.8 Zinc Plated Cr3+Grade4.8 & 5.8 & 6.8 & 8.8MaterialCarbon Steel ,Alloy Steel,Stainless Steel and CopperSurface TreatmentBlack, Zinc Plated(ZP), Yellow Zinc Plated (YZP)and Hot DIP Galvanizing(H. D. G. ), Dacromet, Nickel Plated, Brass Plated.• Carton size : The ordinary carton (27*25*14.5CM) , or according to the demand of the customers.• Packing : plastic bags,Box, carton , then put on pallets, or according to the demand of the customers.• We are a typical China supplier with more than 10 years experiences on fasteners.We are professionally exporting under the standards of DIN, JIS, GB, ANSI, and BS, as well as nonstandard fasteners. Now we have gained close cooperation with clients from Canada, Dubai, Europe, India,Chile,Peru and Russia, and won good comments from users. We always fulfilling customers' expectations by following the principle of "Providing services whenever and wherever our customers need it" to establish a steady beneficial relationship and wining customers' hearts. If you need more information, please contact our sales department.