part 9.851-151.0 Spring washer Ø6 mm Hawk code 9.851-151.0 Details Hawk number9.851-151.0 DescriptionSpring washer Ø6 mm ItalianROSETTA SCHNORR Ø6Qty per pump10 Fits these pumps Hawk NHDP 200-NEMA 4 NHDP2030FNELNHDP2030FNERNHDP3530FNELNHDP3530FNER