Hardware QuickBOLT 1/2" x 4" Roof Screw HEX Driver for 5/16 HWH Screws, 17655 Mfr. Part # 17655 Diameter 1/2 In.
Lag & Hanger Bolts K2 Systems Lag Screw 145/16" x 4" SS, 4000170 Mfr. Part # 4000359 Size D145/16 X 4 In.