ASME/ANSI B18.2.4.4MMetric hex flange nuts
DIN 6923Hexagon nuts with flange
EN 1661Hexagon nuts with flange
GB/T 6177Hexagon nuts with flange
GB/T 6177.1Hexagon nuts with flange,style 2
ISO 4161Hexagon nuts with flange
JIS B1190Hexagon nuts with flange
NF E25-406Hexagon nuts with flange
Q 320Hexagon nuts with flange
Q 321Hexagon nuts with flange
QC/T 613Hexagon nuts with flange