I need some 1/2 T-Nuts. Can't find them at the local big box stores or on amazon, so it was going to be pretty pricy to get them from a specialty hardware mail order store. I used these instead, installing them in some 1/8 thick scrap metal plate, then I mounted the plate with four screws in the corners. You can see other reviews that explain how to expand these with some nuts, washers and wrenches, versus buying the tool.
304 Stainless Steel Machine Screw And Hex Nut Assortment Kit - 170 Pieces By T.K.Excellent
4 Review
45Pcs M6 X 15Mm Zinc Plated Carbon Steel Rivet Nut Insert Nutsert - Fullerkreg
4 Review
Circuit Performance Forged Steel Extended Open End Hex Lug Nut for Custom Wheels: 12x1.5 Purple - Set of 20 + Tool
6 Review
Get A Strong Grip With TICONN'S 100 Pc SAE Rivet Nut Kit - Zinc Plated Carbon Steel Flat Head Insert Nut With Knurled Body (SAE UNC 8-32)
6 Review