M4 External Tooth Countersunk Serrated Lock Washer DIN 6798V, Class 350 HV, Spring Steel, Plain Finish
WHU600-500
https://www.fastenermart.com/mm5/graphics/00000001/DIN6798V.gif
5.44
106.36
2
5.44
100.00
pcs
106.36
2500.00
pcs

DIN 6798 V Specifications