8-18 x 3/8 Square Drive Modified Truss Head Self Drilling Screw Full Thread Zinc NR5 this screw is perfect for

this screw is perfect for projects such as roofing

Its black oxide finish provides excellent corrosion resistance

Case hardened to HR15N and coated with 78/90 Zinc and Bake

The 5/16-24 NE Nylon Insert Hex Lock Nut Black Oxide is a type of fastener used to secure bolts and screws

The zinc coating protects against corrosion

8-18 x 3/8 Square Drive Modified Truss Head Self Drilling Screw Full Thread Zinc NR5 this screw is perfect forThese 8 18 x 3 8" square drive modified truss head self drilling screws are full thread and zinc plated. They are designed for use in metal applications and feature a sharp point that drills its own hole, eliminating the need for pre drilling. The square drive head provides a secure grip for driving, and the modified truss head offers a low profile and a finished appearance. These screws are ideal for use in a variety of applications, including