Used to install Flex-A-Rail. Stainless Steel Number 4 Head with Number 6 Body x 3/4" Long. Head requires a #0 square driver (called a Robertson tip). Predrill with a drill bit for installation. For soft surfaces use a 3/32-inch drill bit; for medium surfaces use a 7/64-inch drill bit; for hard surfaces use a 1/8-inch drill bit. Use the smallest bit size possible to install screws without causing damage to surface or screw head.

The depth of screw when used with Flex-A-Rail track protrudes 0.56 inch into the mounting surface.