Specification Label : It Works Great Manufacturer : It Works Great MaterialType : Carbon Steel MetalType : Aluminum PackageDimensions_Weight : 0.10141264052 PackageDimensions : L:3.2677165321 X W:2.2440944859 X H:0.2362204722 PartNumber : aj00200001 ProductGroup : Home Improvement ProductTypeName : NUTS Publisher : It Works Great Size : 2020 Series M4 SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41MiIThy2XL._SL75_.jpg SmallImage_Width : 75 Studio : It Works Great Title : 20 Pcs 2020 Series T Spring Nut, M4 Thread Roll in Spring Post Assembly T Nuts Hammer Head Fastener Nut Drop in T-Nut for 20 Series Aluminum Extrusion Profile T Slot 6mm for 3D Printer (M4) Weight : 0.1 WeightUnit : pounds