8-15 x 1 1/4 Phillips Pan Self Tapping Screw Type A Fully Threaded Black Oxide BT These 3/8" internal tooth lock

These 3/8" internal tooth lock washers are made of durable stainless steel

It is made of zinc-plated steel and features a hex washer head with a bonded EPDM washer

The M8 x 70 DIN 931 10

The round head design provides a finished look

The screw has a Phillips flat undercut head

8-15 x 1 1/4 Phillips Pan Self Tapping Screw Type A Fully Threaded Black Oxide BT These 3/8" internal tooth lockThese 8 15 x 1 1 4 Phillips pan head self tapping screws are Type A screws, meaning they have a fully threaded shank. They are made of steel and have a black oxide finish. These screws are designed to be used in metal applications and are self tapping, meaning they can create their own threads in the material they are being driven into. They have a Phillips drive, which requires a Phillips screwdriver to install.