Hexagonal flange screws

Dell'Era Ermanno & Figlio produces and sells steel hexagonal flange screws according to the following specifications:

ISO 4162
Materials: steel 8.8 – 10.9

PSA C12 0210
Materials: 8.8

IVECO 11-0124
Materials: steel 5.8 – 8.8 – 10.9

DIN 6921
Materials: steel 4.8 – 5.8 – 8.8 – 10.9 – A2 – A4

ISO 4162
Materials: steel 8.8 – 10.9