Looked in both Lowe’s and Home Depot… No dice – they just don’t carry these screws in-store.
Lowe’s didn’t have anything like these period. Home Depot had a similarly-sized metric screw but it had a cylindrical top instead of a round top with inset hex hole. This screw could probably be used in the existing threading of the stick base but you could hurt yourself if you ever ran your hand or a finger across that screw top. That and I don’t think that personally it would look good on the faceplate.
The rounded cap socket screws they did have in stock were English unit screws so they won’t fit in the threads of the HRAP/T5 bases, period. Remember, Japanese use metric screws and bolts for their hardware! Online really seems like the only viable solution to these screws…
Most American hardware stores stock English hardware and have very small metric selections. Seeing as these screws are specialized hardware, I doubt they’ll be found at a local hardware store.
I was able to confirm at Home Depot that the HRAP 2 SA screws ARE M4’s. The measurement is 14 mm length.
I think I’m going to pay the fellow on e-Bay a little visit now…!
UPDATE: Bought 1 lot of these screws from the fellow on e-Bay that GB3 had a link to.
He’s a former hobbyist kit builder that had a bunch of these screws left and was selling them in lots of 100 for $6.95 +$1.95 S & H. That’s way better than any deal you’ll get in-store. He had two lots left after I bought mine!
These are stainless steel so they should be fairly corrosion-resistant… as long as you don’t leave a stick on the beach near salt water!
GB3, at the very least you can coat these screws with clear-coat Rustoleum spray enamel to provide extra protection. I can’t see why colored Rustoleum can’t be used to coat the heads of them, too. You really wouldn’t want to use anything but a minimal coat, though. The screws still have to fit in the thread. It’s mainly the exposed head that has to be protected from the elements.
I think the Hori SA sticks look fine with their M4’s and they’re only stainless steel, too.