10 Pack 5/16-18 Spot Weld Nuts Single Tab with Target - is a good choice when space limitation is a consideration. This weld nut has a narrow body that is well suited for use in confined areas. The weld nut features a strong single button projection which gives a deeper, more penetrating weld than is ordinarily obtained from other types of projections. Thread Size 5/16-18 Width (in) 5/8" Thickness (in) 9/64" Length (in) 63/64" Hole In Sheet (in) 0.375 Material C1010 High-Welding Quality, Low Carbon Steel Plain Finish Threads Unified Standard Class 2B ASME B 1.1-2003 Welcome to our store. Your satisfaction is our priority. If there are any questions before and after purchase, please welcome to contact us, we will try my best to solve all for you.