Bed Level Thumbscrew

Just insert a DIN934 M3 nut and use one or two DIN9021 washer (optional)

V2 is for bras inserts
https://www.aliexpress.com/item/100Pcs-M3x5mm-L-5mm-OD-Metric-Threaded-Brass-Knurl-Round-Insert-Nuts-LXM/32693221350.html?spm=a2g0s.9042311.0.0.0VSdnu