12-11 x 3 Unslotted Indented Hex Washer Self Tapping Screw Type A Full Threaded Zinc 10-32 NM The 3/8-inch length indicates that

The 3/8-inch length indicates that the screw is 3/8 of an inch long

It also has a bonded neoprene washer

These 8-18 x 2 Phillips Modified Truss Head Full Thread Self Drilling Screws are constructed of black phosphate steel for corrosion resistance and feature a Phillips drive style

while the hex washer head allows for easy driving with a hex key or socket wrench

They have a wing design for easy hand-tightening and removal

12-11 x 3 Unslotted Indented Hex Washer Self Tapping Screw Type A Full Threaded Zinc 10-32 NM The 3/8-inch length indicates thatThese 12 11 x 3 Unslotted Indented Hex Washer Self Tapping Screw Type A Full Threaded Zinc are designed for use in a variety of applications. They are made of durable zinc plated steel and feature a hex washer head that provides a secure hold. The self tapping design eliminates the need for pre drilling, making them easy to install. These screws are full threaded for maximum holding power and are ideal for use in wood, metal, and plastic.