This is a great heavy duty bolt. Use with a 7/16" socket.  It is sold in bulk and comes as a box of 100 bolts. These bolts are strong enough to use with Free to Air dishes and have a built in flare/washer to provide extra holding force when compared with a standard 7/16" bolt. They are also recommended for Dish Network and DIRECTV dishes because of the flared head. It holds the dish more securely than standard bolts to prevent the mounting base from slight movement over time.

Model Name: Hex Washer Head Lag Bolt

7/16" head with built in washer

5/16" shaft diameter

2-1/2" length

Box of 100