8-18 x 1 5/8 Unslotted Indented Hexwasher Self Drill Screw Full Thread Zinc & Bake #N/A and the coarse thread ensures

and the coarse thread ensures a secure hold in drywall

They have a fully threaded body and a square neck under the head that prevents the bolt from turning when tightened

This 3/8-16 x 2 1/2 Ribbed Neck Carriage Bolt is made of Grade 5 steel and has a fully threaded design

The 100º countersink angle allows the screw head to sit flush with the surface

This helps to prevent the bolt or screw from pulling through the material it is being used to fasten

8-18 x 1 5/8 Unslotted Indented Hexwasher Self Drill Screw Full Thread Zinc & Bake #N/A and the coarse thread ensuresThese 8 18 x 1 5 8 inch Unslotted Indented Hexwasher Self Drill Screws are full thread and made of zinc and baked. They are designed for use in a variety of applications, including metal to metal, metal to wood, and wood to wood. The self drilling point eliminates the need for a pilot hole, making installation quick and easy. The hex washer head provides a secure hold, and the zinc and baked finish provides corrosion resistance.