【High Quality Stainless】These Lock Nuts are 100% 18-8 (304) Stainless Steel which is one of the highest forms of corrosion resistant metals, making it last longer than other Nuts on the market today.【Great To Keep Around】Bolt Dropper hex nuts are great to have around for use in wood and wet environments. Bolt Dropper Hex Nuts are the highest quality available on the market and we stand by our claim 100%. They are strong, corrosion resistant and will support all of your projects.【Dimensions】Diameter: 5/16" | Threads Per Inch: 18 | Thread Type: Coarse (standard) | Wrench Size: 1/2" | Quantity: 100 pcs | Material: 18-8 (304) Grade Stainless Steel.【Great To Keep Around】Bolt Dropper hex nuts are great to have around for use in wood and wet environments. Bolt Dropper Hex Nuts are the highest quality available on the market and we stand by our claim 100%. They are strong, corrosion resistant and will support all of your projects. Product Description BOLT DROPPER lock nuts are the only nuts you will ever need to keep your applications secure and withstand the tests of time. Bolt Dropper nylon insert hex lock nuts are solid stainless steel. No exterior finish, no coatings, nothing but the finest 100% 18-8 (304) stainless steel. You'll never have to worry about the "stainless steel coating" chipping because there is none! Hate rust? Yeah, us too! That's why Bolt Dropper nuts are made with Marine Grade stainless steel. Use them on your boat, dock, car or anything else. Not only will you have that bright shiny stainless look, it will last! No rust stains. Bolt Dropper is a proud American company offering only the finest quality products. Not only are our fasteners dependable, but we are as well. Our fasteners are used by a wide range of customers, from contractors to hobbyists. We go the extra length to ensure our customers receive exactly what they want and we stand by our products. From marinas to a swing set, Bolt Dropper lock nuts get the job done. Made from solid stainless steel allows them to be used in a variety of environments including salt water, freshwater, indoor and out. The possibilities are endless! Hex nuts are six sided making them easy to tighten with a wrench or socket. They are used in conjunction with a bolt, threaded rod or other threaded fastener. The nylon insert compresses around the threads of the bolt/screw greatly increasing friction causing the nut to lock around the screw. This causes the nut to not come loose but still able to be undone with a wrench. Excellent for making sure the nut doesn't come off! Stainless Steel Nylon Insert Hex Lock Nuts not what you're looking for? Not to worry, Bolt Dropper offers an expansive selection of screws, nuts, washers, zip ties and more! Color Silver Dimensions 0.5 x 0.43 x 0.31 inches Material Stainless Steel Stainless Steel Inside Diameter 1/4"-20 #4 5/16” #12 Material 18-8 (304) Stainless Steel 18-8 (304) Stainless Steel 18-8 (304) Stainless Steel 18-8 (304) Stainless Steel Quantity Quantity Quantity - Quantity Thread Type Coarse (standard) Coarse (standard) Coarse (standard) Coarse (standard) Threads Per Inch 20 40 18 24