6-19 x 3/8 Phillips Flat High Low Screw Fully Threaded 18-8 Stainless Steel 1/4" and it also helps to

and it also helps to prevent the screw from loosening

10-16 x 3/8 Phillips Pan Self Tapping Screw Type B Fully Threaded Black Oxide:

indicating 20 threads per inch with a diameter of 1/4 inch

which means that it can be used in thicker materials

6-19 x 3/8 Phillips Flat High Low Screw Fully Threaded 18-8 Stainless Steel 1/4" and it also helps toThis 6 19 x 3 8 Phillips flat high low screw is fully threaded and made of 18 8 stainless steel. It has a Phillips drive and a flat head with a high low profile. The screw is designed for use in a variety of applications, including metal, wood, and plastic. It is corrosion resistant and has a tensile strength of 180,000 psi. The screw is RoHS compliant and meets ASTM F593 specifications.