My local hardware store only had 4-40 nuts that were 1/4" X 3/32" (see photos), so I resized the 3d printed part using Tinkercad to fit the nuts I had available.
The nuts are a snug fit. Pliers may be required to seat them in place,
T_Nut_for_4-40_nut_.25_x_.090.stl | 26.5KB |