3/4” Diameter x 1/2 Tall Rubber Feet for Amps & Speakers w Recessed Steel Washer for Furniture, Appliances, Electronics, Equipment, Computing Equipment. Rubber Bumpers & Spacers. (8)

Rubber feet for your case: https://a.co/d/068R2S1j I forget the “M” screw size, but a local hardware store is an option to find the right screw and nut sizes. If you get long screws that need to be cut down, thread the nut on first so you can chase the threads after cutting by removing the nut.