Large flat washers; outside diameter = 3x or 4x the nominal thread diameter
- Class:
- HV100
- Pitch:
- Family:
- 51500
- UNI:
- 6593
- DIN:
- 9021
- ISO:
- 7093
- The three different sets of rules, in some cases, differ in the hole, in the exterior and in the thickness. In practice, the differences generally allow for either use in most cases. The table refers to the most popular sizes