want threadlocker with coulour-change if broken

Have a good story ready for why you need it. I've found it in all the electrical coding colors, some of which would be really weird on fingernails.

-jsw

But you are in California.

A dot of fingernail polish on one side of the head and the surrounding workpiece. No strength, but a clear indication if it has turned.

Enjoy, DoN.

A broken lockwire is a good indicator. So are the flags that get applied on safety-critical fasteners

I marked the caliper box to prevent storing it upside down and letting the batteries fall out and short against the case. I set the case down once and saw a tiny puff of smoke. Whoa! When I popped it open, I found the battery trying to arc weld the case of my new digital calipers. A dot on the top cover reminds me to store it upright.

I have pink metalflake and clear from Dollar Tree. I put it on a screw to remind myself that I've had the lid off that particular piece of equipment.

Yeah, ROYGBIV works, but BBROYGBVGW would be weird on lady's fingernails. (Right, Violet?)

Ooh, windy rain is now pouring down here. Possible thunderstorm tonight. Get ready, all you downwinders. Judging by the national weather radar on

, you may already have your antenna down.

The problem is I can only see (easily) the threaded end of the fastener, and it's part-way down the through hole. The hole is stepped - larger at the eld I can see, but the screw does do project into the larger section.

I want to put a drop in the well, and be able to look later to see if the screw has turned, so it has to stick to the screw and the hole and change colour if it's been broken.

Time for some experimentation...

My bottle of Grey nail polish broke when I tried to open it to mark the Maytag timer, and finding a nonmetallic replacement was difficult.

Weather radar showed the intense squall line that passed through NY and CT breaking up before hitting us. I didn't hear a single thunder boom.

-jsw

It wouldn't be that hard to do but I haven't seen a commercial product. Look into microencapsulation.

-jsw

Used it a lot when I did electronics repairs. I used a real ugly green. Made it easy to tell if I had worked on an item before and if the part had been touched by someone else.

For the OP, I've not seen a single coating that changes that way, BUT if you put a small dot of the paint at the junction of screw/part. it would show up if the screw was moved because the coating would be broken and shifted. Another option would be a simple index mark, like using a sharp scribe across the end of the screw and up the interior of the hole. Misalignment means the screw has moved.

Loctite 7414 tamper detection paste ?

Dykem Cross Check - Torque Seal - Tamper Proof Indicator Paste?

DIY high-security tamper seals:

ICK! Having worked in a building owned by an ex-Navy man (gray exterior with 1' band of maroon near the top, gray interior paint, darker gray carpeting, gray benches, gray countertops) I got a bit tired of that lovely, bright color and try not to purchase anything gray to this day. My wool hiking socks are the exception. Whuffo you use gray nail polish? Wouldn't black be a better contrast for a timer marking?, or were you remaining true to the original icky color?

Although I didn't hear any thunderstorm last night, I awoke this morning to a repeated beeping in the other room. Looking at the bedside clock, it was dark. The power just now came back on and the heater feels good. 75,061 people lost power (for 3-4 hours) in Oregon this morning due to many trees taking down power lines. They trim the trees every year to prevent that. Go figure.

Coffee was made on a propane burner (first things first) and then I settled back against the wedge on my bed to read by 48 LED panel from a survival lantern I built. It has a 9w 3 LED spot in MR-16 body and a 5Ah 12v gel cell.

139ma @ 12vdc I also used them to replace my cargo lights over the truck bed, where they work well.

I like your idea. It would make for quick inspection of fasteners. Eric

Try a pinstriping brush or fine artist's paint brush. They're thin and long. It that's still too large, dip a straightened paper clip into the nail polish and poke that down the little hole to get to the fastener.

I was dabbing the color of the removed wires directly on the rivet of the Faston tabs, since the wire number labels aren't all close to their terminals.

The Navy must have unloaded their surplus grey paint on the Army after retiring the battleships because it was our standard interior and equipment color too.

What if the tamperer buys that stuff too?

Nowadays one might use DNA "ink".