American Welding Society Structural Welding Code D 1.1 Paragraph 9.25 Quality of Welds 9.25.1.5 “Undercut shall be no more than 010 in. (0.25 mm) deep when the weld is transverse to the primary stress in the part that is undercut.”
From G.A.L. Cage, Co. WTPS. Gauge is precision made from stainless steel all marking and dimensions are chemically etched for ease and clarity when reading.