the proper way to make a pipe bomb is NOT to screw end caps onto a threaded pipe, but to screw couples to the threaded pipe ends and then screw plugs into the couples, otherwise the cheaply made end caps are so weak they just blow out.
don’t they teach ANYTHING worthwhile in junior high school anymore?
(handy tip: don’t buy all of the parts for a pipe bomb from the same hardware store, but instead, buy one or two parts from several different hardware stores, along with some other innocent stuff like condoms or Playboy magazines ...)
I spent 35 years in the wholesale hardware distribution business. I’ve never been in a hardware store that sold condoms or Playboy magazines.
smile.
But some do still sell dynamite. Many sell ammonium sulfate fertilizer.