Report this document 600 - · PDF file 24/7 0.25 HEAVY BARREL "HB" 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. NL Flange Thk 0.56 0.62 0.69 0.81 0.88 1.00 1 .12 1.