Pentair 58001000 Nylon Hex Lock Nut Replacement FNS Plus Pool or Spa DE Filter Sku: PEN-58001000-HZ91 This is a brand new part comes with a full manufacturer warranty!!! This sale transaction is for only this part number: 58001000. This hex lock nut is designed to use with Pentair FNS Plus pool and spa D.E. filters. Made of nylon. Features: Hex lock nut replacement Fits Pentair FNS Plus pool and spa D.E. filters Made of nylon TERMS OF SALE: If, after receiving this item you discover that it was not the one you wanted, simply return it for a full refund within 14 days. You will have to pay for the return shipping charges. Refund is void if you have installed, used or damaged the item in any way. Item must be returned with its original box, packing materials and instructions. Payment via PayPal must be received within 3 days of transaction and prior to shipping. SHIPPING: Shipping charge will be based upon location. Please use the shipping calculator or request a shipping quote. International buyers: Customs fees, duties, taxes, tariffs other fees are your responsibility. Arrival time will depend on your location. If you have any questions, feel free to ask. Thank you for visiting!