SO Flange 4" - 400# 3 Images | 2 Formats | 0 Likes | 0 Comments | 3 Downloads Download - Part / Inventor (0.22 MB) - STEP (0.03 MB) Categories - Piping- Flanges- SO Flange Tags/Keys SO Flange, 4", class 400, 400 lbs, 3d model, step file Sign In Likes 0 Share Similar files Comments 0 Sign In