Flex-Loc 21FK-518 Heavy Hex Lock Nut: Flex Top, 5/16-18, Grade 2 Steel, Cadmium Finish
Heavy Hex Lock Nut: Flex Top, 5/16-18, Grade 2 Steel, Cadmium Finish 17/64" High, 0.5640" Width Across Flats, 0.5530" Flange Dia, Right Hand, MIL-S-7742 (MOQ=10, Pkg Qty=1)
Not Cancelable or Returnable!