4-24 x 1/4 Phillips Flat Undercut Self Tapping Screw Type AB Fully Threaded Black Zinc 3/8-16-.312 The internal teeth bite into

The internal teeth bite into the surface of the mating part

This 1/4-20 x 1 Slotted Indented Hex Head Machine Screw is fully threaded and made of 18-8 stainless steel

This 1/2-13 x 1 5/8 Hex Cap Screw Grade 5 Zinc is a high-quality fastener designed for secure and reliable connections in various applications

The 7/16-14 x 6 1/2 Hex Cap Screw Grade 5 Zinc is a high-quality fastener designed for demanding applications

which means they can create their own threads in the material they are being screwed into

4-24 x 1/4 Phillips Flat Undercut Self Tapping Screw Type AB Fully Threaded Black Zinc 3/8-16-.312 The internal teeth bite intoThe 4 24 x 1 4 Phillips Flat Undercut Self Tapping Screw Type AB Fully Threaded Black Zinc is a versatile and durable screw designed for a wide range of applications. Its 4 24 thread size and 1 4 inch length make it suitable for use in thin materials, while its Phillips drive provides a secure and easy installation. The flat undercut head sits flush with the surface of the material, creating a clean and professional finish. The self tapping design