... -0.015 Hexagon flange nuts A.Product specifications Hex flange nuts StandardASME B18.2.2,ASME B18.16. ... 4,DIN6923,EN 1661,ISO 4161,DIN 6331,JB 8004.1,etcHex flange ... 6-3/4”)Custom made products are also welcomed. Flange nuts Materials1.Stainless Steel: SS201, SS303, SS304, ... etc as per your need. Hexagon flange nuts Salt spray time 2 hours, 24 hours, 48 hours, ...