Stair Supplies has done extensive research to find the best possible fasteners for installing your cable railing posts. We offer 5/16″ diameter GRK fasteners in two lengths depending on your application. The 4″ screws are perfect for our surface mount or angled foot posts, while the 6″ are required for installing side mount & side mount bump out posts.
Purchase a 4 pack of screws for every 2″ square post you’re going to install. Single screws are also available if you need extras for your project.
5/16″ x 4″ & 5/16″ x 6″ Hardened Mounting Screws for Cable Rail posts from GRK Fasteners a North American Company. Extremely easy to install, these screws will make your installation life simple. These are designed for interior and exterior installations into solid framing materials. The screws require a special driver which is included in our installation kit and is sold separately. We recommend using these in most installations, however some installations might require a different mounting system.
Bending Yield 190,920 PSI
Tensile Strength 178,051 PSI
Shear Strength 123,592 PSI
Bending Yield 118,360 PSI
Tensile Strength 104,767 PSI
Shear Strength 86,880 PSI