This is a set of 4 original flat head tapered bolts for a Singer cast iron treadle sewing machine base. These are the bolts that fix the sides or legs to the cross brace. It only takes the 4 bolts. These bolts are in top condition. There are two styles of bolts used on these bases. This one with the flat heads and a nut and the others are just a more standard style slotted head bolt. These flat heads were used on the older bases.  They are not interchangeable, so be sure your base uses this flat head style.   

Get Grandma's old treadle working again with these bolts.