On Dec 4, 5:52*pm, worker bee wrote:
For reasons explained elsewhere, I would love to replace the 'spout' of
about ten Blitz five-gallon plastic portable gasoline containers with a
simple gas cap.

Well, you can't. CARB has made it illegal to sell anything but the
CARB-compliant spouts to fit gas cans. Most other states have followed
suit.

Even if you knew what thread it was, you couldn't legally obtain
anything to fit it, except a replacement CARB-compliant spout.

The thread is a proprietary thread specific to Blitz's gas cans. I
have a couple of Blitz cans, a few Sceptre cans, and one Harbor
Freight special. All different threads.

The cap from one brand will cross-thread on to the others because
they're close, but unless you use the original cap it leaks like a
sieve.