I am restoring a snapper rer 83 model 26064 and I removed the Bull Head bolts 4 on mine some has 6 the xtra tough series they say in the manual to discard the old bolts and replace them but they are in great shape why would you need new ones?? If they are afraid they will back off use a little lock tite on them appreciate some input on that I contacted Snapper they did not know!! Thanks Matt Dillon