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I lost an m7 set screw. What do I do?

M7 set screws are impossible to find in hardware stores. So instead of paying out the wazoo for a single screw online, is like to find another way to safely hook up the power cable on my amp. (I found an m7 bolt in lowesb afraid it'll arc and cause a fire if I use that)

Is there a way to solder this 4 gauge wire to the amp?

Its for a class D monoblock subwoofer amplifier in my car.
thirdeyethirdear
thirdeyethirdear OP
9 posts
 
That's a really good idea. I thought about cutting the bolt. Ill see if my old dremel is in the garage. 

And ill keep my feelets out for an original in the mean time

(Fyi bdp24, my ace has metric too. But the m7 set screw is "antiquated" says the ace rep)
Thanks to all for responding.
thirdeyethirdear OP
9 posts
 
I made my own m7 screws. I took Theo's advice, and I cut the hex heads off of some m7 bolts.  I put each screw in a power drill, then used my hack saw to get through each screw. 10 minute job.
Next step it to cut some flat head slots, and file off the one bur on each screw.

Thanks Theo.

theo's avatar
theo
2,665 posts
 
Glad to help. Have a Merry Christmas 
n80
2,107 posts
 
Once again I'll point to McMaster-Carr. See my link above. Pretty much every kind of set screw. You should be able to get precisely what you need. No rigging, no fab work.  Their shipping is often alarmingly fast. Ordered a couple of trinkets from them one night, paid regular shipping, it was on my porch at noon the next day.
thirdeyethirdear OP
9 posts
 
Thanks for recommending McMaster, they have every set screw imaginable... Except for m7. The ones I made are perfect. Quarter inch, with a flat head top. If I could post pics on this forum, I would show you what I did. I made a few (just in case I lose another one). I'm all set. Installing the rest of the wiring this afternoon.
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