Comparison : Item # SS-2-HN-2RS, Hex Nipple BSP/ISO Parallel
Item # SS-4-HN-4RS, Hex Nipple BSP/ISO Parallel
Item # SS-6-HN-6RS, Hex Nipple BSP/ISO Parallel
Item # SS-8-HN-8RS, Hex Nipple BSP/ISO Parallel
Item # SS-12-HN-12RS, Hex Nipple BSP/ISO Parallel