$10 Hex Nut Low-poly 3D model by orhanyucesoy. Available on CGTrader with 2112 polys and 2112 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 44.7 KB), MAX (Autodesk 3ds Max, filesize: 122 KB), C4D (Cinema 4D, filesize: 55.6 KB), FBX (Autodesk FBX, filesize: 61.6 KB)