Hey guys, I need help....again! I'm in the process of finishing up my boring head ball turner. My boring head came in the other day with an MT3 shank. I made a new shank with a 3/4" diameter. I'm wanting to add a thrust washer at each end of the shank at the boring bar holder. I currently don't have bronze, any type of plastic suitable or anything. What I do have is aluminum and possibly brass. Would the brass work? I know very little of thrust washers. Could I find something else to work at the local hardware store?