The best replacement for bolts is studs.

The best alternatives to bolts are rated as following:
★★★★★  studs
★★★★★  screws
★★★★  rivets
★★  arrows
★★  welding
★★  head studs
★★  set screws
★★  grade 8
★★  nuts
★  grade 8 bolts
★  nuts commercial
★  standard bolts
★  arrows runescape
★  dragon
★  j bolts
★  english bolts
★  grade 5
★  ez anchors
★  stainless steel bolts
★  toggle bolts
★  welds
★  carriage bolts
  tumble
  main studs
  onyx
  316 stainless steel bolts
  lag bolts
  grade 5 bolts
  rods
  anchor rods
  straps
  a325

Your alternative for bolts is not listed? Suggest!
Speaking about bolts, one probably shouldn't forget about knobs.

Other search terms related to bolts and their ratings are:
★★★★★ knobs
You have in mind a companion for bolts and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bolts in all years. Click on graph for more.
bolts
studs
screws