Hardware SnapNrack Rectangular Base Flange 1.5" AlMg, 172-05807 Mfr. Part # 172-05807 Diameter 1-1/2 In.
Lag & Hanger Bolts IronRidge QRail 20mm SS T-Bolt w/Nut Mill, QMR-TB20P-A-300 Mfr. Part # QMR-TB20P-A-300 Size 20 mm