Comparison : Item # HCN02500XXX, Hex Coupling Nut, 0.2500" Nominal Dia.
Item # HCN03125XXX, Hex Coupling Nut, 0.3125" Nominal Dia.
Item # HCN03750XXX, Hex Coupling Nut, 0.3750" Nominal Dia.
Item # HCN04375XXX, Hex Coupling Nut, 0.4375" Nominal Dia.
Item # HCN05000XXX, Hex Coupling Nut, 0.5000" Nominal Dia.


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