.8
This is an 8 screw, spring type u nut. It is made of brass and has a black finish. It is used to secure objects together, and has a diameter of .8 inches.
The AU-VE-CO AV2716 #8 1-1/4 PHLPS OVAL HD TAP SCREW PK/100 is a screw with a hexagonal head that is designed for use with a hole saw. It has a Phillips head and is made of high-density polyethylene.