316 Stainless Steel Hexagon Nipples. Class 150lb Fittings Screwed BSP,1/4″ ST/ST HEX NIPPLE,1/8″ ST/ST HEX NIPPLE,3/8″ ST/ST HEX NIPPLE,1/2″ ST/ST HEX NIPPLE3/4″ ST/ST HEX NIPPLERead less