A notched collar, not a screw thread
Gas One SZBUT5S12 butane, 8 oz × 12
The only cartridge on this shelf and the only one that states it reseals: 227 grams of pure butane in an eight-inch can with a notched collar, twelve to a box.
On the maker’s own page
Twelve butane fuel canisters for portable camping stoves.
Gas One states twelve butane fuel canisters, new and sealed; cartridges that
automatically reseal when removed from the stove; a notched collar for easier
alignment to the stove; and use with butane backpack camping stoves. The
description gives model Gas-1, a height of 8 inches, a diameter at the bottom of
the can of 2.5 inches, and 8 oz (227 g) a canister.
No mix. No gross weight. No EN 417.
A notched collar, not a thread
The sentence that decides everything.
This shelf’s introduction names three incompatible systems: the EN 417 threaded
canister with its 7/16 inch UNEF screw valve, the bayonet canister with a
different fitting entirely, and the pierceable canister with no valve at all.
This is the second kind. A notched collar indexes the cartridge into a slot; it
does not screw into anything. It is what portable table-top butane stoves take.
This shelf’s buying tip: a threaded canister and a bayonet stove is a stove you
cannot light. The reverse holds just as hard.
Pure butane
And what that costs below freezing.
Butane boils at about minus half a degree Celsius, so near freezing it stops
making enough vapor to feed a burner. Propane boils at about minus forty-two,
and it is what keeps a blended can working in winter.
This shelf’s introduction makes this the whole point of the mix: butane-heavy mixes
lose pressure as the temperature drops.
This is the only unblended fuel on the shelf. For a table-top stove in summer
that is fine; on a frosty morning it is the wrong can.
It reseals
The only listing here that says so.
“Cartridges Automatically Reseal when Removed from Stove.”
Resealability is one of the seven figures this shelf compares, and the
introduction above notes it as a property of the threaded canister. Five listings
here publish a plastic cap for storage and nothing about the valve; this one
publishes the valve behavior.
Two hundred and twenty-seven grams of gas
Joint largest net weight among the American canisters here, and the most efficient of them to carry.
The one listing on this shelf that publishes a gross weight gives 198 grams for
100 grams of gas — about half the load is steel on a small can. A larger can
carries proportionally less.
The catch is the shape: eight inches tall and 2.5 across does not nest inside a
pot, which a squat 100-gram canister does.
Gas One’s own instructions on the canister carry the handling. Nothing here
replaces them, and nothing on this page describes any product as safe.
Availability
The American Amazon store was listing it at about $33 at the time of writing.
Every figure here is what Keepa held on the day this page was last revised. Offers and prices shift without warning.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
