What is that stupid RV fastener used everywhere?

[mlwinnig]

Used in 2000 Dutchmen TT and 1995 Newmar Class A and, I think, 1976 Shasta TT.

It looks a little like a Phillips with a square drive center but it's not! (I have used screws which could be driven with either and it's not the same). The "wings" are somewhat curved.

I have had to buy complete security bit sets to get the single bit (Menards and Harbor Freight). HF set does not identify it though sizes appear to be 8 and 10. I think this one is the 10.

I want to buy a bunch of longer impact-rated bits for an impact driver.

Help please!

Thanks!

[qtla9111]

Just like the American standard system, we have problems adjusting to the rest of the world.

P. L. Robertson - Wikipedia
https://en.wikipedia.org/wiki/P._L._Robertson

Peter Lymburner Robertson (December 10, 1879 – September 28, 1951) was a Canadian inventor, industrialist, salesman, and philanthropist who popularized the square-socket drive for screws, often called the Robertson drive. Although a square-socket drive had been conceived decades before (having been patented in ...

[IAMICHABOD]

It could be a Robertson Screw,they are used a lot in RV stuff.Does it look like this.


You can buy all types of bits that fit it on Amazon

[Corkey05]

If it not square it's probably a Clutch Drive , or a Supa Drive that's a cross between square and philips, using a #2 square usually works. Not used for production much anymore, but still out there.

[SidecarFlip]

Not stupid at all. It's a production screw item that can be power driven without fear of stripping the head. Buy the correct drive bit and be happy.

[newman_fulltime]

it is a number 2 square drive bit