well i did not mean the edge

i bolted the one side of the washer down with a flat head then i buff the washer face . i did all my button heads and bolts this way bolt them in a stick .them button heads are EZ to buff . the STICK your calling a pig tail

.i make up my .AN washer i buy the bigger washer with big O.D then if i need a good fitting 3/8 i buy a 5/16 id washer .i can buy them cheap stack up 15 to 20 on a long bolt and lock them all down with a nut the drive the 3 jaw off the nut and the bolt is a center drill in one end for the live center .then face them all down on the lathe sure beats cutting them out of flat plate and a hole saw that s abit of a pain i needed a off size and made up some like that too
Break out the shoe horn...........
1968 Plymouth Valiant 1st Gen HEMI