3/8-12 x 3/4 Unslotted Indented Hex Washer Self Tapping Screw Type AB Fully Threaded Zinc 1/4-20-3 and the square head allows

and the square head allows for easy installation with a wrench

The head has a domed top and the neck has four flats

These 8-18 x 3/8 Phillips Round Self Tapping Screw Type AB Fully Threaded Zinc are designed for use in a variety of applications

They have a hex washer head with an indented drive for increased torque and a self-tapping design that eliminates the need for pre-drilling

it features a full thread design for maximum grip and a 6-lobe flat head that allows for easy driving and prevents cam-out

3/8-12 x 3/4 Unslotted Indented Hex Washer Self Tapping Screw Type AB Fully Threaded Zinc 1/4-20-3 and the square head allowsThese 3 8 12 x 3 4 Unslotted Indented Hex Washer Self Tapping Screws Type AB are fully threaded and made of zinc plated steel. They have a hex washer head and an indented drive. These screws are designed for use in metal and are self tapping, meaning they create their own threads as they are driven into the material. They are commonly used in a variety of applications, including automotive, construction, and manufacturing.