Comparison : Item # LNDCZ-M19-408, M19 Thread Size Die-Cast Zinc Lock Nut
Item # LNDCZ-GT-M22-1.5-58, M22 x 1.5 Thread Size Die-Cast Zinc Lock Nut with Grounding Teeth
Item # LNDCZ-NG-M22-1.5-410, M22 x 1.5 Thread Size Die-Cast Zinc Lock Nut with No Ground
Item # LNDCZ-SG-M22-1.5-411, M22 x 1.5 Thread Size Die-Cast Zinc Lock Nut with Serrated Ground
Item # LNSB-M16-412, M16 Thread Size Solid Brass Lock Nut