Introducing the 1/4 - 20 Inch Nylon Insert Lock Nut Set by POWERTEC. This premium (50) pack collection of hex lock nuts was designed for an assortment of indoor and outdoor applications. They are best utilized when paired with externally threaded components that measure 1/4 inch and that have 20 threads per inch, such as common bolts and studs. They are threaded, and meant to work seamlessly with your items, offering a smooth application without jamming or binding on the bolt, causing damage (like some lesser quality brands). These cost effective lock nuts are made with 18-8 304 stainless steel, delivering an optimal level of chemical, rust and corrosion resistance - making them ideal for fresh and salt water applications. Their strong construction also provides you with a reliable fastener that outperforms zinc plated versions, and last much longer under the toughest conditions. Order these nylon insert lock nuts today and see what the professionals are ranting and raving about. Specs Diameter: 1/4" Inside Diameter Thread Size: 20 Threads per Inch Material: 18-8 (304) Stainless Steel Quantity: 50 Pack POWERTEC is a leading manufacturer of high quality woodworking tools and accessories, machines, and an assortment of OEM replacement parts. We are committed to exceeding expectations, while bringing the latest Innovations, technology, and product development to the industry.