6-20 x 5/8 6-Lobe Flat Self Drilling Screw Fully Threaded Zinc & Bake WFG they provide a secure hold

they provide a secure hold in a variety of materials

The 4-40 x 2 1/4 Phillips flat machine screw is a fully threaded screw with a Phillips drive

They are also ideal for use in tight spaces or where a flush finish is desired

including binding documents

The 8-32 x 5/16 Slotted Round Machine Screw Fully Threaded Zinc is a versatile fastener designed for a wide range of applications

6-20 x 5/8 6-Lobe Flat Self Drilling Screw Fully Threaded Zinc & Bake WFG they provide a secure holdThese 6 20 x 5 8 6 Lobe Flat Self Drilling Screws are fully threaded and made of zinc and baked steel. They are designed for use in a variety of applications, including metal to metal, metal to wood, and metal to plastic. The 6 lobe drive provides a secure hold, while the self drilling tip eliminates the need for pre drilling. These screws are also corrosion resistant, making them ideal for outdoor use.