M4X0.7X2.00 Metric Flat Head Round Open-End Rivet Nut Steel Zinc Yellow Dichromate (Pack Qty 2,000) BC-XS-M42.00Y

One popular use is as a leg leveler. Large flange provides a greater bearing surface that increases push-out strengthYou may also like 1 1/2-6X8 Coarse Thread Socket Head Cap Screw Black DFAR (Pack Qty 1) BC-150128CSP.