5/16-12 x 3 Slotted Indented Hex Washer Self Drilling Screw Full Thread Zinc & Bake MNKA2 They have a hexagonal shape

They have a hexagonal shape with two flats on opposite sides for easy tightening and loosening with a wrench

while the plain finish offers versatility for use in different environments

The bolts are sold in packs of 100

The 1/4-20 x 3/4 Phillips Indented Hex Washer Machine Screw Fully Threaded Zinc is a type of screw that is used in a variety of applications

5/16-12 x 3 Slotted Indented Hex Washer Self Drilling Screw Full Thread Zinc & Bake MNKA2 They have a hexagonal shapeThe 5 16 12 x 3 Slotted Indented Hex Washer Self Drilling Screw Full Thread Zinc & Bake is a versatile fastener designed for a wide range of applications. Its self drilling tip eliminates the need for pre drilling, saving time and effort. The slotted indented hex washer head provides a secure hold and prevents the screw from slipping. The full thread design ensures maximum holding power, while the zinc and bake coating offers excellent corrosion