They already offered that. I am more interested in getting an opinion from
them. My mechanic had them look at an oil filter that had a problem, and he
said they actually took a close look at it and let him know what the problem
was. I hope they are as helpful on this.

"nrp" wrote in message
ups.com...
I have since found another engineer who also thought sparkplug blanks
were indeed machined from screw stock (i. e. resulfurized or leaded
free machining steel alloys). That would still suggest a possible raw
material fault. I certainly wouldn't want any plugs made from that
particular bar.

Be sure you save it. I'll bet you could exchange that plug with its
manufacturer for a new one...........!