- Single coil spring square washers for screws with cylindrical heads (DIN 7980, BS 4464 A, BS 4464 B, BS 4464 BP)
- Spherical spring washers for disc wheels C (DIN 74361-1)
- Split lock washers (DIN 127, UNI 1751, NF E25-515, NF E25-516, NF E25-517, BS 4464 B)
- Split lock washers with double rings ≈ DIN 127
- Split lock washers, commercial and heavy type, italian standards