self tapping sheet metal screws with rubber washer

Innovations in construction nuts and bolts continue to evolve. High-strength alloys, corrosion-resistant coatings, and specialized designs such as hexagonal heads for better grip all contribute to enhanced performance and durability. Furthermore, smart bolts equipped with sensors are being developed, capable of monitoring stress levels and providing real-time data, thereby promoting safer and more efficient construction practices.

...

Self-drilling screws, as the name implies, eliminate the need for a separate drilling step, as they have a cutting tip designed to pierce through material without requiring a pilot hole. This not only saves time but also reduces the risk of material damage that can occur with traditional drilling methods. The 1 1 4 self-drilling screws refer to a specific size, which typically signifies a 1/4-inch diameter and a 4-thread pitch. The numbers '1' and '20' often represent the diameter in imperial measurements, while '4' indicates the number of threads per inch.

...