round washer enlarged PN M-82030 , for M20 thread , 
- hole 21 mm ,
- width 52 mm ,
- thickness 5,0 mm,
- approximate weight 1000pcs - approx. 69.70kg,
use:
for threaded connections
        - hole 21 mm ,
- width 52 mm ,
- thickness 5,0 mm,
- approximate weight 1000pcs - approx. 69.70kg,
use:
for threaded connections