4 Highly detailed 3D model assemblies of different types of nuts, bolts, screws, and washers including a thumb bolt, a philips head bolt,a hex head bolt, a flat head machine screw, a flat washer, a star lock washer, two sizes of jam nut, a dome capped nut, and a wing nut all in 3D Studio (.3ds) and Wavefront (.obj) formats. Materials are included making these models suitable for very closeup rendering. Beautiful!