Carriage Bolt Supplier, China Carriage Bolts Factory

What is a carriage Bolts

A carriage bolt is a round head(mushroom head) square neck bolt, which also called coach bolts. Carriage bolts are widely used to fasten metal to metal or metal to wood parts.

What are carriage bolts used for?

For example, there are carriage bolts for deck, carriage bolts for wood, carriage bolts for steel or metal, carriage bolts for pergola, etc.

Why is it called a carriage bolt?

Carriage bolts are one of most common types of bolts, as its name suggest, these bolts are used to constructing carriages and their wheels in early stages.

What is the difference between a lag bolt and a carriage bolt?

Carriage bolts are round head square neck bolts, while lag bolts are hex head round neck which has a point at the end and wide threads, usually used in wood applications.

Are carriage bolts used for decks?

Yes, carriage bolts are widely used to attached deck guardrail posts to decks, decks to houses, as well as tracker deck, rail deck, etc.

Do carriage bolts need washers?

Carriage bolts and nuts are designed to used together, but not washers, as they prevent the square underside of the head from functioning properly.

Are carriage bolts strong?

Yes, carriage bolts can hold heavy weight. For example, a Grade 5 carriage bolt made out of carbon steel has a tensile strength of 120,000psi or 8437 kilogram-force per square metre.

Are all carriage bolts the same size?

No, carriage bolt sizes range from M5 to M20 in different length. Carriage bolts or coach bolts M6, M8, M10, M12 are most common seen.

What can I use instead of a carriage bolt?

It depends on your applications to use carriage bolts made of different materials. For example, hot dipped galvanized steel to resist corrosion, and stainless steel carriage bolt is used application submerging in water.

How do you keep carriage bolts from spinning?

carriage bolts have a square neck under its mushroom head which resist turning or tapping into the wood. Also carriage bolts and nuts are used together to prevent spinning.

How do you attach carriage bolts to wood?

First we have to drill a hole for the same size of carriage bolts, or maybe even a little larger. Then slide the carriage bolts into the hole, and attach the nuts and washers when the nut through the wood.

Is a carriage bolt stronger than a hex bolt?

Carriage bolts are round head square neck, which hex bolts are hex head, partial thread or full thread. There's a difference in their relative strengths, mostly because the bearing surface of a carriage bolt head is smaller than that of a hexagon bolt with a washer.

What is the strongest carriage bolt?

Carriage bolts and nuts are designed to work together and tightening. The strongest carriage bolt depends on its grade, there are grade 5, grade 8, grade 10 etc.

Do you make Grade 8 carriage bolts?

Yes, grade 8 is available from our production lines. These carriage bolts can be used with wood, metal, furniture or concrete to build strong structures such as wooden decks. 

Can you use carriage bolts on metal?

Yes. Carriage bolts are designed for connecting wood to wood, metal to wood parts.

What are carriage bolts made from?

Carriage bolts have different grade, which determined by its materials including low or medium carbon steel with a black, zinc, or hot dip galvanized finish.

Fastenwell manufacture and supply carriage bolts with size range from M5 to M20, surface available is black, zinc plated, hot dip galvanized, and environment friendly surface. Most common seen carriage bolts grade are grade 5 and grade 8.

For price and delivery about bulk carriage bolts, please feel free to ask our technician or sales representative info@fastenwell.cn

Keywords: Carriage bolts, Coach Bolts, Carriage Bolt Suppliers, China Carriage Bolts Factory