1 4 self drilling screws

The rubber washer plays a crucial role in this assembly. Made from durable and resilient materials, such as neoprene or silicone, it offers excellent compression and sealing properties. When tightened, the rubber washer compresses between the screw head and the surface it's fixed to, creating a waterproof and airtight seal. This is particularly beneficial in situations where leakage or environmental elements need to be kept at bay, such as in roofing, plumbing, or automotive applications.

...

The 'full-threaded' part of the name implies that the entire length of the rod is threaded, from end to end. This design offers several advantages over partially threaded rods. It allows for maximum engagement with nuts or tapped holes, providing superior holding power and load distribution. Additionally, full threading provides more flexibility in adjusting the length of the assembly, as the rod can be cut to size without losing any thread engagement area.

...

Another advantage of wedge anchors is their adaptability. They come in various sizes and lengths, making them suitable for a wide range of applications. Moreover, they can be designed to suit different environmental conditions, including those that require corrosion resistance, enhancing their durability and lifespan. This adaptability is particularly important in industries such as marine, industrial, and outdoor construction, where exposure to harsh elements is common.


...