5/8"-18 Grade 8 Hex Nut - Yellow Zinc Plated 5/8-18 grade 8 hex nut (fine) yellow zinc HN85818 $0.477/ea
5/16"-18 Grade 8 Hex Nut - Yellow Zinc Plated 5/16-18 grade 8 hex nut (coarse) yellow zinc HN851618 $0.063/ea