5/16-12 x 2 Unslotted Indented Hexwasher Self Drill Screw Full Thread Zinc & Bake C8FTP They have a hot-dipped galvanized

They have a hot-dipped galvanized finish for corrosion resistance and are made in North America

while the 100º countersunk head allows for a flush fit when driven below the surface

The 4-40 x 3/8 6-Lobe Pan Machine Screw Fully Threaded Black Oxide is a small

The bolt has a square head with a washer face that provides a larger bearing surface and helps to prevent the bolt from turning when tightened

and they meet the specifications of ASTM A307

5/16-12 x 2 Unslotted Indented Hexwasher Self Drill Screw Full Thread Zinc & Bake C8FTP They have a hot-dipped galvanizedThe 5 16 12 x 2 Unslotted Indented Hexwasher Self Drill Screw Full Thread Zinc & Bake is a versatile and durable fastener designed for various applications. Its self drilling tip eliminates the need for pre drilling, saving time and effort. The full thread provides maximum holding power, while the indented hex washer head allows for easy installation with a wrench or socket. The zinc and bake coating offers corrosion resistance, making it suitable for