Milton 556 Large Bore Inflator Gage by Milton Industries

so this is the milton industries 580 kit it's made in the USA with us and global components you get the fittings the batteries everything you need to use it right out of the box it's a one-year warranty comes with the typical ball foot the dual head the dual head straight and it comes with the easy on that has the little locking mechanism that clamps on to a valve stem then it comes with a really heavy-duty tail the instructions say to put the tail on to the inflator with no teflon tape and there is no oring on this either I'll just show you what this fitting looks like and that there is no there's no o-ring on that which I'm a little confused about it seems to me like that's the type of fitting that has an o-ring it just threads on to this and this end is just flat it's not it's not beveled or contoured so anyway I'm following the instructions with what I what they gave me in the Box I