Feature●1. [Size]: Thread: 5/16-18. Length: 0.69"; Width: 0.62"; Height: 0.24".●2. [High Quality]: Made of carbon steel with black zinc finish. When used with bolts (not included), this hardware makes a strong and durable connection.●3. [Application]: This t-nut is used with 5/16-18 bolts (not included) to attach corner brackets, hinges and other t-track accessories to 15 series aluminum extrusions.●4. [Great for DIY]: Perfect for any home improvement enthusiast, this 5/16-18 metal nut will make a great addition to your fastener hardware toolbox!●5. [Package Included]: 20 * 5/16-18 Steel Standard Slide in T-Nut. If you have any problem, please contact us through Amazon, we will reply you within 24 hours.Description