10-16 x 1 1/4 6-Lobe Flat Self Drilling Screw Fully Threaded 410 Stainless Steel WFD316 It has a hex shape

It has a hex shape and a coarse thread pattern

The 1/2-13 x 1 Hex Cap Screw Grade 9 DFAR EcoGuard USA is a high-strength fastener designed for use in demanding applications

The 5/16-18 x 1 Phillips Pan Full Thread Machine Screw Black Oxide is a type of screw that is used to fasten two pieces of metal together

Ideal for applications where vibration or movement may compromise the integrity of the joint

zinc-plated

10-16 x 1 1/4 6-Lobe Flat Self Drilling Screw Fully Threaded 410 Stainless Steel WFD316 It has a hex shapeThese 10 16 x 1 1 4 inch 6 lobe flat self drilling screws are made of 410 stainless steel and are fully threaded. They have a flat head with a 6 lobe drive and a sharp point that drills its own pilot hole. These screws are designed for use in metal applications and are ideal for attaching metal to metal or metal to wood. They are also corrosion resistant, making them suitable for outdoor use.