I think the OP = Original Poster is referring to a 53 3100 radio.
Chevrolet Radio Shop and Service Manual for 1951 Passenger Cars and Trucks
Radio Receiver 986443 Radio fig. 65 part # 7242365 Felt Washer
Interestingly it doesn't show felt washer under
installation parts list.
Radio Reference Guide 1950-52, 986443, 6 tube, Single Unit Truck Radio with Straight Back
1940 - 1952 Chevrolet Radio Parts and Dealer Price Schedule Washers felt, tone & volume control Knobs
Custom made Felt Flat Washers Part number search
Result Original GM #: 7242365 I thought they were a black color.
fixit1958,Your slant back model # 986067, the code is 41 and 41 is included in the above
1940 - 1952 Chevrolet Radio Parts and Dealer Price Schedule Washers felt, tone & volume control Knobs
