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.

1. Toggle Bolts These consist of a bolt and a pair of wings that open up inside the wall. When you insert the bolt, the wings expand and grip the back of the wall, providing a strong hold. Toggle bolts are excellent for heavier items, making them suitable for mounting shelves or large picture frames.

Applications

1. Toggle Bolts Often used in hollow walls, toggle bolts feature a spring-loaded wing that expands once inserted through a hole in the wall. When the bolt is tightened, the wings clamp down against the inside of the wall, providing a strong hold.