weld neck flange 1 1/4 Inch Class 400 Posted on February 11, 2017July 1, 2017 weld neck flange 1 1/4 Inch Class 400 Weld Neck Flange Class 400 Size NPS : 1 1/4″ Size DN : 32 mm. Weight : 2.7 kg. StudBolt Size : 5/8″ UNC Or (M16) x 95 Long No. of Bolts : 4 EA. Holes Diamater : 19.05 mm. [wpfilebase tag=file id=2147 /] ansi b16 5 ansi flange dimensions ansi flanges asme b16 5 Class 400 flange dimensions raised face flange Weld Neck Flange weld neck flange Class 400