I puchased a flagpole from lee Valley. The knob at the top didn't screw on properly. I called them and the service person said we'll send a new knob, just put the bad one in the same box and return it to us.
I thought that is good. Then the service person contacted me and said they would send me the whole thing, flag pole and everything. He went into their warehouse and decided each pole was a slightly different thread.
So they sent the whole thing no charge, apologized at length. Worked out great!
I have had a few service interactions with this company over the years and I can tell you they are with out doubt the best company for service and response (you call their number a LIVE person answers!) I have ever dealt with.