10-16 x 1 6-Lobe Flat Self Drilling Screw Fully Threaded Zinc & Bake 5/8-18 NTE 4 x 12 ISO14581 Metric

4 x 12 ISO14581 Metric 6-Lobe Flat Machine Screw

375" outer diameter

and the drive type is hex

These 10-24 x 1 Slotted Indented Hex Washer Head Machine Screws are fully threaded and made of 18-8 stainless steel

it features a black zinc and bake finish for enhanced corrosion resistance and durability

10-16 x 1 6-Lobe Flat Self Drilling Screw Fully Threaded Zinc & Bake 5/8-18 NTE 4 x 12 ISO14581 MetricThese 10 16 x 1 6 Lobe Flat Self Drilling Screws are fully threaded and made of zinc and bake. They are designed for use in a variety of applications, including metal, wood, and plastic. The 6 lobe drive provides a secure grip, and the self drilling tip eliminates the need for pre drilling. These screws are also zinc plated for corrosion resistance.