55 clips and screws per bag. The TC-G Butt Seam Clip has been specifically designed for butt seam applications when building with the TC-G hidden fastening system. Eliminates Additional Joists. This clip has been designed as a mirror image of the TC-G clip allowing an installer to install two clips per joist at the butt seams. This eliminates the need for additional joists and creates a much stronger connection.