The welding flanges are machined from 6061-T6 Alum. Each dash number relates to the O.D. of the flange and the NPT thread size.

AN867-1    1-1/2” Dia   1/8” NPT

AN867-2     1-3/4 Dia     ¼” NPT

AN867-3      1-7/8” Dia    3/8” NPT

AN867-4       2”  Dia          ½”   NPT

AN867-6       2-1/4 Dia      ¾” NPT