Ray
Original ones I've removed had this bolt, 7/16 head with an N on it and a 3/4 wide washer. It is 7/8 inch long
Frank Badalson carries shaker feet bolts but I am not sure what is on the head.
The other two in the picture are original grill screw ( S on head... 8 req'd )and original screw that secures rear of cold door to grills ( E on head...2 req'd)
All are black phosphate