screw in tire plug ?

[Al st1100]

Which makes me wonder, How come loose screws and bolts always work loose, but never tighten. I have seen the loose ones but they aren't tighter when I go back to look and tighten

Vibrations, in particular, induce transverse sliding, causing the bolt to rotate loose or the joint materials to settle. Thus the need for lock washers, stretch bolts and loctite to name a few.

 

[Pop-Pop]

The small hole I made in my spare tire was successfully plugged with the small screw- in plug device. Then a couple days ago I drilled a hole through that tire and plugged it with the larger ( 6 mm ) screw-plug. Now, 2 days later, that one is holding air just fine.

View attachment 375062View attachment 375061
Of course these are “static” tests, without this wheel and tire being mounted on a vehicle, bearing weight, and being dragged down the road.

Do u coat these with rubber or contact cement too?

 

[Valker]

I have these, but I used to carry sheet metal screws and rubber cement.