Carriage Bolts

Product Introduction: Carriage bolts, also known as coach bolts, are a type of fastener that features a smooth domed head and a square section under the head. They are designed to be tightened by hand or with a wrench and are commonly used in wood and some types of metal applications where a flush, clean finish is desired.

Product Details:

• Material: Typically made from carbon steel, stainless steel, or brass, chosen for strength and resistance to corrosion.
• Thread Type: Available in various thread types, including machine screw threads for use with a nut or wood screw threads for direct insertion into pre-drilled holes. — Finish: Often (galvanized) or plated with other materials to protect against rust and improve appearance.
• Application: Suitable for a wide range of applications, from furniture assembly to automotive and construction projects.

Structural Features:

1. Domed Head: The rounded head of the carriage bolt sits flush against the material surface, providing a clean, professional finish.
2. Square Neck: The square section under the head prevents the bolt from turning when tightened, which is ideal for wood and some metal applications.
3. Threaded Shaft: The shaft of the bolt is threaded to facilitate secure fastening into the material.
4. Corrosion Resistance: The protective finish helps to prevent rust and corrosion, prolonging the life of the bolt.

Installation Process:

1. Hole Preparation: Drill a hole in the material that matches the diameter of the bolt’s threaded shaft.
2. Bolt Insertion: Insert the bolt through the hole, aligning it with the nut or material to be fastened.
3. Nut Tightening: If a nut is used, tighten it onto the bolt by hand or with a wrench until secure.
4. Final Check: Ensure the bolt is properly tightened and the materials are securely fastened together.

Applicable Environmental Conditions:

1. Temperature Range:
   • Carriage bolts are typically designed to withstand a wide range of temperatures, from approximately -50°C to 300°C, making them suitable for both cold and hot environments.
2. UV Resistance:
   • For outdoor applications, the protective finish on carriage bolts provides UV resistance, ensuring they do not degrade due to sunlight exposure for extended periods.
3. Corrosion Resistance:
   • The corrosion resistance of carriage bolts can be quantified by their material and finish; for example, galvanized bolts offer a certain level of protection against salt spray for up to 1,000 hours, depending on the specification.
4. Chemical Resistance:
   • Carriage bolts made from stainless steel or with specific coatings can resist various chemicals, with resistance levels varying based on the material and protective treatments applied.