The present invention provides a cage nut assembly 100, 200, 300, 400, 500, 600, 700 having a nut member 102, 202, 302, 402, 502, 602, 702 and a cage member 104, 204, 304, 404, 504, 604, 704. The nut has a threaded aperture 116, 216, 316, 416, 516, 716, therethrough. The cage 104, 204, 304, 404, 504, 604, 704 is capable of encaging the nut 102, 202, 302, 402, 502, 602, 702 such that the nut 102, 202, 302, 402, 502, 602, 702 has a limited range of movement within the cage 104, 204, 304, 404, 504, 604, 704 in at least one dimension. The cage 104, 204, 304, 404, 504, 604, 704 has an aperture 130, 230, 330, 430, 530, 630, 730 therein sized and located to allow access to the threaded aperture 116, 216, 316, 416, 516, 616, 716 of the nut 102, 202, 302, 402, 502, 602, 702 within the range of movement of the nut 102, 202, 302, 402, 502, 602, 702. The cage 104, 204, 304, 404, 504, 604, 704 has a plurality of protrusions 140, 142, 160, 240, 242, 260a, 260b, 340, 342, 360, 440, 442, 460, 540, 542, 560, 64, 642, 699, 740, 742, 760 such as dimples or tabs, extending therefrom. The protrusions 140, 142, 160, 240, 242, 260a, 260b, 340, 342, 360, 440, 442, 460, 540, 542, 560, 640, 642, 699, 740, 742, 760 are capable of being welded to a mating surface to secure the cage 104, 204, 304, 404, 504, 604, 704 to a mating surface. The cage 104, 204, 304, 404, 504, 604, 704 includes a seam 158, 258, 358, 458, 575, 675, 775.