The Hillman Group 4369 7/8-9 Stop Nut (Nylon Insert Large Diameter) Zinc Plated (2-Pack)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Nylon Insert Lock Nuts have a captive undersized nylon washer that creates friction with the mating threads to prevent loosening</li><li>Helps resist the effects of vibration and other forces</li><li>Stainless steels are used for their corrosion resistance， high-temperature strength， scaling resistance and low-temperature toughness</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41MrSPSpGOL.jpg' noproxy></br>