Iron Carriage Bolt - 2 Inch Length, 6mm Thickness | Heavy Nickel-plated, Round Head, Complete With Nuts And Washers

Carriage bolts are a type of fastener commonly used in woodworking and metalworking. They are characterized by a smooth, rounded head and a square section beneath the head that prevents the bolt from turning when the nut is tightened. Here are some key specifications and details about carriage bolts:

1. **Head Type:**
- **Round Head:** The head is domed and provides a clean appearance.
- **Square Underneath the Head:** This design helps to keep the bolt from rotating.

2. **Thread:**
- Carriage bolts typically have coarse threads, which are designed to provide a strong grip in wood and other materials.
- Common thread standards are Unified National Coarse (UNC) for bolts used in the United States.

3. **Materials:**
- **Steel:** Most common, available in various grades such as Grade 2, Grade 5, and Grade 8.
- **Stainless Steel:** Provides higher corrosion resistance.
- **Brass or Zinc-Plated:** For decorative or corrosion-resistant applications.

4. **Sizes:**
- Carriage bolts come in a range of sizes, with the diameter and length usually specified. Common diameters include 1/4", 5/16", 3/8", 1/2", and 3/4". Lengths can vary from a few inches to several feet.
- Size is usually specified as Diameter x Length (e.g., 1/4" x 2").

5. **Dimensions:**
- **Head Diameter:** Varies depending on the bolt size, but typically the diameter of the head is larger than the diameter of the shaft.
- **Head Height:** Also varies by size, but generally, the head is taller than it is wide.

6. **Thread Pitch:**
- This refers to the distance between threads and is usually specified in threads per inch (TPI) for UNC threads.

7. **Applications:**
- Used in situations where the bolt needs to be fixed into a material that does not have access for a wrench on the other side, such as in wooden structures.
- Commonly used in the construction of wooden frames, metal-to-wood connections, and other similar applications.

8. **Standards:**
- Carriage bolts conform to various standards, such as ASTM (American Society for Testing and Materials) and ISO (International Organization for Standardization), which ensure consistent quality and performance.

9. **Finishes:**
- Carriage bolts may be coated with various finishes to prevent corrosion or enhance appearance, including zinc plating, hot-dip galvanizing, or black oxide.

Understanding these specifications helps in selecting the right carriage bolt for your project, ensuring the right fit and performance for your application.