Guide to Common Bolt Types and Their Industrial Uses

Imagine skyscrapers without reliable fasteners or bridges lacking secure connections. Bolts, as fundamental mechanical fasteners, play a pivotal role across industries. This article examines three of the most common bolt types—hex bolts, carriage bolts, and lag bolts—highlighting their distinct characteristics and applications.

Named for their six-sided heads, hex bolts are among the most widely used fasteners. The hexagonal design allows for high torque application using wrenches, ensuring robust fastening. Available in diverse specifications and materials, hex bolts are indispensable in:

• Mechanical equipment assembly
• Structural building frameworks
• High-strength joint requirements

Identifiable by their domed or mushroom-shaped heads and square necks beneath, carriage bolts embed into materials during installation to prevent rotation. Their flush-surface design makes them ideal for:

• Wooden structural projects
• Furniture manufacturing
• Public installations like park benches and railings

These heavy-duty fasteners specialize in wood connections. Featuring coarse threads and pointed tips, lag bolts penetrate timber without pre-drilling. Common applications include:

• Log cabin construction
• Substantial woodworking projects
• Load-bearing wooden structures such as bridges

Selecting the appropriate bolt type is critical for ensuring structural integrity and safety. Understanding these fasteners' unique properties enables engineers and builders to make informed decisions, ultimately guaranteeing project durability.