https://store.astm.org/a0197_a0197m-00r15.html
A197/A197M Standard Specification for Cupola Malleable Iron
standard specificationcupolamalleableiron
https://www.lowes.com/pd/Charman-Manufacturing-2-in-dia-Black-Iron-Floor-Flange-Fitting/1001218926
Charman Manufacturing 2-in Black Iron Floor Flange for Structural/Decorative Use, ANSI/ASTM A197...
Shop Charman Manufacturing 2-in Black Iron Floor Flange for Structural/Decorative Use, ANSI/ASTM A197 A153 Approved, -20F to 300F Temperature Range 660610B in...