Name: MF Curved Locknut, concave lock nutMaterial: Carbon steel,Finish: HDG to meet ASTM A153Size: 1/2”,5/8”, 3/4”, 7/8”,1” square and HexFeature:Used as a locking nut on the back of nuts. When concave side of locknut bears down top of square or hex nut, the arch is flattened, deflecting the nut threads from their true helix and causing them to firmly grip the bolt threadsConcave square lock nut, M-F Curved Lock nuts, concave locknut, MF Curved LOCK NUTS, MF lock nut, MF TYPE LOCK NUTS , herrajes galvanizados, Eletroferragens,contra tuerca, contra-porca, Hubbell: 3510, 3511, 3512, 3513,
