The Threadless Nyloc Nut has a number of spectacular advantages not available with any existing fastening hardware. As shown, a nylon insert is provided with hole diameters to accommodate any standard size bolt. In this unique design, the nylon insert is not threaded, which is a cost savings. One size nut can handle coarse or fine-metric, SAE, UNF, BSW, or any other type threads for a specific bolt diameter . . . [Click Here to Continue]