NIPPLE, PLUG, FEMALE, STEEL-ZINC Pacific Bay Equipment Sale! from $11.80 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Steel Nipple, hardened steel combined with zinc yellow chromate plating holds up to the harshest environments. PSI Max: 4000 Zinc-Plated Hardened Steel Ranges by thread size If you need help finding the correct size, give us a call!