Direct Attachments SnapNrack Ultra Rail Wide Base Seam Clamp w/L-Foot & Lock, 242-05159 Mfr. Part # 242-05159
Lag & Hanger Bolts Unirac 5/16"x4.5 Lag Bolt & Structural Screw SS , 030045C Mfr. Part # 030045C Diameter 5/16 In. Size 5/16 x 4-1/2 In.