Although they'll work fine without it, you may want to Dremel or hacksaw about 1/4" off the threaded piece. If you don't, the distance between the other two brass fittings is wider than the actual movie prop. Not a big deal, and I doubt anyone would notice the difference.
So here's the complete parts list, per connector:
WATTS 3/8" FINE THREAD FLARE NUT (A-161, green pkg)
WATTS BRASS PIPE NIPPLE 1/4" X CLOSE (A-740, pink pkg)
AMFLO 1/4" to 1/4" FEMALE PIPE COUPLINGS (#344FE-RET)
1/4" wood dowel
The Watts pieces are found in the plumbing section and the Amflo piece is found in the air compressor area. I found all these pieces at Lowe's.
The flare nut is not EXACTLY like the prop piece, but it's the closest piece we have right now.
I hope this helps!
::Edited correct diameter of wood dowel::