Napa part numbers for 2/0 are 728531 negative clamp and 728530 for positive clamps. 4/0 cable part numbers are 728551 neg and 728550 pos. If you have 1/0 cable the part numbers are 728521 neg and 728520 pos. They also have 3/8" cable lugs for 1/0 cable, part n... Login to read more.