10-24 x 1/2 Phillips Pan Split Lock Washer Sems Fully Threaded Zinc 1/4-20-1 They are made of A325

They are made of A325 steel

and fully threaded

which gives it excellent corrosion resistance and strength

and the self drilling tip eliminates the need for pre-drilling

It is made from durable steel and hot-dipped galvanized for corrosion resistance

10-24 x 1/2 Phillips Pan Split Lock Washer Sems Fully Threaded Zinc 1/4-20-1 They are made of A325These 10 24 x 1 2" Phillips pan split lock washers sems fully threaded zinc are designed to prevent loosening under vibration and shock loads. They are made of zinc plated steel for corrosion resistance and have a Phillips pan head for easy driving. The split lock washer provides a secure hold by digging into the mating surface, while the fully threaded screw ensures a strong connection. These sems are commonly used in automotive, construction, and