A325 fasteners are heavy hex structural bolts that conform to the specifications set forth by the American Society for Testing and Materials (ASTM). These fasteners are primarily used in conjunction with A325 nuts and are designed to create bolted connections in steel structures, providing robust and durable performance under various loads and environmental conditions.

The term 2% self-drilling screws generally refers to a specific classification or standard that adheres to a manufacturing specification, often denoting the composition or performance traits of the screws. The 2% might relate to various factors such as the percentage of alloying elements in the material, or guidelines that measure performance under certain conditions. For instance, these screws might contain 2% alloying elements that enhance their strength and corrosion resistance.

1. Material Compatibility Fine thread screws are ideal for attaching drywall to wood, but when dealing with certain hardwoods, a pilot hole may be necessary to prevent splitting, especially near the edges. Understanding the type of wood you are using can guide you in deciding whether a pilot hole is required.