Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The left panel shows a threaded plate with a locking self-tapping screw (left), a locking self-drilling screw (right), and 2 empty plate holes on each side. The right panel shows a non-threaded plate with a self-tapping screw (left), a self-drilling screw (right), and 2 empty plate holes on each side.
