Carriage bolts are classified according to the size of their heads into two types: large semi-circular head carriage bolts (corresponding to standards GB/T14 and DIN603) and small semi-circular head carriage bolts (corresponding to standard GB/T12-85). Carriage bolts are a type of fastener consisting of two parts: the head and the screw (a cylinder with external threads). They need to be used in conjunction with a nut to fasten and connect two parts with through-holes. Generally, bolts are used to connect two objects through a hole, and they require a nut to function; on their own, they do not provide a connection. The typical tool used is a wrench. The head of the bolt is usually hexagonal or other shapes and is generally larger. Carriage bolts are designed with a grooved, four-sided neck that gets stuck in the groove during installation, preventing the bolt from rotating. This design allows the carriage bolt to move parallel in the groove. Since the head of the carriage bolt is round and lacks slots or hexagonal shapes for tools, it can also help deter theft during the connection process.

Q1. How do you ensure the quality of each process?
A1: Our quality control department checks each process to ensure the quality of every product. Additionally, we personally inspect the products at the factory during production.

Q2. What is your delivery time?
A2: Our delivery time is typically 30 to 45 days, depending on the quantity.

Q3. What is the payment method?
A3: We require a 30% advance payment by wire transfer and the remaining 70% upon receipt of the bill of lading. For small orders under $1,000, we recommend prepaying 100% to minimize bank charges.

Q4. Can you provide samples?
A4: Yes, we can provide samples free of charge, but the courier fee is not included.

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