8-15 x 1 1/4 Slot Ind HWH 1/4" Across The Flats F/T Self Piercing Scr Needle Point Zinc 12-8 increasing the load-bearing area and

increasing the load-bearing area and reducing the risk of damage to the surface being fastened

It has a round head with a square neck beneath it

a coarse thread for maximum holding power

This 5/16-9 x 2 A/F hex washer head lag screw is made of steel and has a zinc finish

These 10-16 x 1/2-inch

8-15 x 1 1/4 Slot Ind HWH 1/4" Across The Flats F/T Self Piercing Scr Needle Point Zinc 12-8 increasing the load-bearing area andThese self piercing screws are designed for use in high strength steel applications. They have a hex washer head with a 1 4" across the flats drive, and a sharp needle point for easy penetration. The screws are made of zinc plated steel for corrosion resistance. They are available in a variety of lengths from 8 15 inches.