Pentair 194989Z Machined Nut Replacement Nautilus Pool and Spa Stainless Steel Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Machined nut replacement</li><li>Fits Pentair Nautilus pool and spa stainless steel filters</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41RYi8-TVAL.jpg" noproxy>