Modeled using Alibre Atom3D . Used dimensions from machinery's handbook for threads. Threads are 4-6 UN. CAUTION: Tolerances are close between threads of bolt and nut. Once you run the nut up and down carefully, it gets better. See pdf drawing for overall size dimensions. Feel free to customize. If you have any questions or edit ideas please let me know. Thanks.

Edit 5-22-23: added caution note