8-11 x 1 3/4 Square Phillips Drive Round Washer Deep Thread Type17 2/3 Thread Black Oxide CH188 These washers are made of

These washers are made of black oxide steel

These self-drilling screws feature a flat head and a 3/4-inch square drive

The bolt is 7 1/2 inches long and has a diameter of 5/16 inches

This 5/16-18 x 3/4" Phillips pan thread cutting screw is made of 18-8 stainless steel and is fully threaded

8-11 x 1 3/4 Square Phillips Drive Round Washer Deep Thread Type17 2/3 Thread Black Oxide CH188 These washers are made of8 11 x 1 3 4 Square Phillips Drive Round Washer Deep Thread Type 17 2 3 Thread Black Oxide These screws are made of steel and have a black oxide finish. They have a square Phillips drive and a round washer head. The deep thread type 17 2 3 thread provides a strong hold in wood and other materials. These screws are commonly used in construction, automotive, and other industrial applications.