These are from a 1923 magneto. As you see, they have no holes for safety wire like the earlier ones. Should they be drilled?
Clean all threads 100% and use red loc-tite.
Glues have evolved over the last 100 years and wiring most things just isn't needed anymore.
*check the temp ratings on the loc-tite and engine oil before taking my advice!
I have yet to glue them and yet to have them come apart. Knock on wood!
Think about all the countless man hours spent at Ford putting cotter pins in the oil pan bolts up through 1924 until finally they were sure it would work with just lock washers. And cost cutting had been practiced everywhere on the Model T design for 15 years by then..
Ford just didn't stop wiring until they were really sure it would stay tight without.
(Ok, I used loctite too.)
Clean up the threads, chase the threads in the flywheel and get them tight and they'll never come loose.
Wiring doesn't keep them from coming loose, only from falling out. I never wire them and have had no problems. Like some one mentioned use lock tite if you are concerned. KGB
Ford discontinued the wired bolts and did not use loc-tite, you can do the same with no problems.
The problem is if one of the magnet spacers cracks and falls out then the bolt is loose. With safety wire you have a good chance it won't cause disaster. Otherwise you don't have that chance. All mine have been safety wired.