How tough are IK27 plugs?

[Dugaru]

Ordered four plugs from Amazon and of course they came in a (minimally) padded envelope with one of them already freed from the little box. It still had the protective plastic collar however. I've heard horror stories about insidious failures of aviation plugs with invisibly cracked ceramic bits ("drop it once, drop it the second time in the trash"). Should this one be trashed?

 

[Cth6]

Measure the resistance.

Putting my flame suit on.... I have dropped quite a few auto plugs over the years and unless the ceramic shears off, I have never had one fail. You can also bomb test it with an adapter in a regular aviation spark plug tester.